Patent
Suchergebnisse für: CIRCULAR SLIDERULE
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Patent:CN86210645u
31.10.1987 : Circular Slide Rule For Converting Electric Level [29.18%]
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Patent:GB100182
01.03.1917 Buechi, Edouard Frederic (P) : A New or Improved Pocket Direction Instrument for Artillery. [7.01%]
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Patent:GB100569
01.06.1916 Haddan, Alfred John Henry (P) : Improvements in and relating to the Differential Mechanism, Totalizer Actuating Arrangements and Transfer Devices of Adding and Subtracting M [13.58%]
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Patent:GB102734
11.12.1917 Elsner, O.; Ramuz, O. Effort S A L : Apparatus for Sorting and Counting Discs of Different Diameters [6.34%]
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Patent:GB1045383
12.10.1966 Mannesmann (P) Meer AG : Improvements in or relating to calculating machines [10.89%]
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Patent:GB106208
17.05.1917 Smithey, Marvin (P) : Improvements in Odometers. [18.02%]
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Patent:GB106246
17.05.1917 Bridge Norman Cressy : A Device for use in Measuring the Areas of Plane Figures. [10.85%]
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Patent:GB1065482
19.01.1967 Dennert, Hans (P), Dennert, Georg (P) Dennert und Pape (P) : Scale reading magnifier [6.83%]
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Patent:GB107228
18.06.1917 Berson, Theodore (P) Holophane Ltd : Improvements in and connected with Slide Rules and like Calculating Instruments [16.77%]
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Patent:GB107562
05.07.1917 Hemmi, Jiro (P) : Improvements in the Slide Rules [12.25%]
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Patent:GB108197
27.07.1917 Martin, Arthur John (P) : Improvements in Slide Rules for use in Wireless Telegraphy [12.39%]
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Patent:GB108512
07.08.1917 Richardson, James (P) : Improvements in and relating to the Determination of Volumes of Solid Bodies [11.10%]
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Patent:GB109330
13.09.1917 Glaser William Henry : Improvements relating to Calculators. [18.70%]
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Patent:GB110851
08.11.1917 Shephard, Harry (P) : Improvements in or relating to Calculating Apparatus [6.38%]
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Patent:GB1113256
08.05.1968 Retel, Rene (P) Rhone Poulenc Sa : Slide rule [6.93%]
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Patent:GB112012
19.12.1918 Giot, Henri Louis Victor Desire (P) : Improvements in Stars Transit Calculators and Indicators for Mariners. [16.65%]
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Patent:GB112145
28.12.1917 Flavell, Leo Edward (P) und Priest, Clarence Sidney (P) : Improvements in Totalizing Apparatus. [12.56%]
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Patent:GB1125293
28.08.1968 Alfred Henry Fielding Richardson : Improvements in or relating to calculating devices [17.26%]
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Patent:GB112681
24.01.1918 Christie, Robert Arthur : Improvements in Slide Rules. [10.79%]
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Patent:GB1128213
25.09.1968 Paul Milton Pepper : Improvements in or relating to calculating devices of the slide rule type [17.37%]
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Patent:GB1131329
23.10.1968 Dorey, Frederick Charles (P) British Airports Authority : Calculator for use in computing charges made by time [6.15%]
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Patent:GB114321
25.03.1918 Manson Jermiah Leask : Improvements in Calculating Rules [7.06%]
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Patent:GB115207
13.12.1917 Buchanan, W. S. : Slide Rules for Determining the Output of Paper Making Machines [21.40%]
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Patent:GB1168995
29.10.1969 Heppenstall, Philip; Mear, Norman : Improvements in or relating to Circular Slide Rules [21.67%]
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Patent:GB117318
18.07.1918 Chew, Albert Charles (P) : Slide Rule [17.05%]
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Patent:GB120696
21.11.1918 Ritter, Sophus Frederik (P) : Improvements in Cash Control or Checking Apparatus. [7.01%]
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Patent:GB120980
29.11.1918 Eastwood, William (P) : Improvements in or appertaining to Watches, Aneroid Barometers and other dial instruments [16.14%]
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Patent:GB121009
05.12.1918 Banwell, Ernest : A New or Improved Appliance for Calculting Workmens Wages and the like [6.05%]
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Patent:GB121066
05.12.1918 Buchanan, William Stanhope (P) : Improvements in Slide-rules for Calculating the Weight of Rare Size Sheets of Paper from the Known Weight of Standard Size Sheets of like Thickness or Substance [26.45%]
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Patent:GB122900
06.02.1919 Cox, Charles Henry Farley (P) : Improvements in or relating to Slide Rule for Finding the Value of Goods sold by Weight or Measure [11.14%]
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Patent:GB123989
02.09.1920 Poor Charles Lane : Improvements in Calculating Instruments [27.66%]
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Patent:GB124281
21.03.1919 Smith, George (P) : Improvements in Money Boxes. [17.21%]
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Patent:GB125165
26.06.1916 Wright, H. R. : Calculating Apparatus [16.62%]
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Patent:GB126090
08.05.1919 Isaki, Fukutaro (P) Nihon Suitoki Kabushiki Kaisha : Improvements in and relating to Transfer or Carrying-over Mechanism [6.65%]
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Patent:GB126453
08.05.1919 Scarlett, Frederick Ernest (P) Wilson, Edward Other (P) : Device for Obtaining the Diameters [18.45%]
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Patent:GB1272760
03.05.1972 Giancarlo Gaggero Carla Mongini-Tamagnini Antoine Settipani Euratom : Circular calculator for the solution of problems connected with electromagnetic radiation penetration [26.38%]
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Patent:GB128002
13.06.1919 Boggio Alfredo Santiago : Improvements in Apparatus for Calculating the Date of Expiry of a Given Period [10.57%]
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Patent:GB128217
02.09.1920 Odhner, Valentin Jakob (P) : Improvements in or relating to Locking Devices in Calculating Machines of the Cam-disk and Pin-wheel Type [4.29%]
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Patent:GB129290
04.10.1920 Ford, Hannibal Choate (P) : Improvements in or relating to Apparatus for Electric Step-by-step Signalling Systems [28.34%]
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Patent:GB129312
17.07.1919 Marden, Basil Jock Newton (P) : New or Improved Method of Directing a Route to a Pre-determined Destination through an unknown Country by observation of either the Sun, Moon or Stars and an instrument therefor. [16.08%]
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Patent:GB130426
07.08.1919 Lees, Edgar (P) Whitehead Torpedo Works : Improvements in or relating to the Gyroscopic Steering Mechanism of Automobile Torpedoes [17.12%]
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Patent:GB131584
19.08.1918 Liedstrand, Karl Emil Leonard (P) : Statistics, Compiling and Sorting [31.52%]
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Patent:GB134558
11.12.1919 Douglas, H. P.; Appleyard, Rollo (P) : Improvements in range finding and like apparatus [23.31%]
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Patent:GB134833
05.11.1918 Fabriques des Montres Zenith : Slide Rule [15.08%]
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Patent:GB136182
08.01.1920 Appleyard, Rollo (P) : Apparatus for Ascertaining the Logarithmic Decrement of Damped [14.37%]
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Patent:GB146046
08.07.1920 Glover , Albert William (P) George Glover & Co Ltd : Improvements in gas meter indicators [6.43%]
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Patent:GB146440
28.07.1921 Pestourie, Pierre (P) : Improvements in or relating to Odometers. [17.09%]
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Patent:GB147113
29.09.1915 Trinks, Franz (P) : Adding and Subtracting Apparatus [16.53%]
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Patent:GB150103
02.09.1920 Leonard Charles Bygrave : A calculating instrument for aerial navigation purposes [27.75%]
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Patent:GB150813
06.09.1920 Stevens, William James (P) : Improvements in or relating to course and distance calculators and the like [17.85%]
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Patent:GB1517976
19.07.1978 Salvia Werk : Circular Slide Rule Suitable For Use In Determining The Electrolyte Deficiency In Infusion Therapy [14.69%]
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Patent:GB152417
12.07.1919 Harper, John : Improvements in tea-pots and such like vessels [12.35%]
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Patent:GB1530487
01.11.1978 Peters M : Plane Triangle Solver [29.62%]
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Patent:GB154756
09.12.1920 John St Vincent Pletts : Improvements in Slide Rules [16.45%]
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Patent:GB160186
24.03.1921 Francis James Anderson : Improvements in or relating to logarithmic computing apparatus [16.35%]
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Patent:GB162347
05.05.1921 Burroughs (P) Adding Machine Co : Improvements in or connected with paper-carriages for calculating machines [16.00%]
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Patent:GB167099
04.08.1921 August Straub, Andreas Hochstrasser : Improvements in or relating to sliding rules [6.96%]
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Patent:GB175064
10.02.1922 William James Smith Bliss Co : Improvements in Slide Rules [21.51%]
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Patent:GB177411
30.03.1922 William Thomas Palmer : An improved calulator [21.24%]
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Patent:GB188908891
29.05.1889 Webb, Charles Henry (P) : Circular Adder [23.96%]
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Patent:GB189510583
05.10.1895 Norris, Thaddeus (P) : Improvements in Slide Rules [23.78%]
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Patent:GB189518
29.11.1922 Gaston, Beauvais (P) : Improvements in or relating to logarithmic calculating devices [16.42%]
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Patent:GB189614623
15.05.1897 Sheridan, Matthew Joseph (P) : A New and Improved Slide Rule for Reducing Spirits [9.41%]
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Patent:GB189624616
19.12.1896 McPherson, John Ambrose (P) : A Slide-rule for Indicating and Facilitating Regulation of Quantities of Water Flowing over Gauge Weirs [18.21%]
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Patent:GB189917651
14.04.1900 Union Typewriter Company : Improvements in Typewriting and Adding Machines [16.15%]
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Patent:GB189919288
21.07.1900 Farmar, Francis Charles (P) : An Improved Slide-rule for Computing and Calculating Purposes [17.61%]
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Patent:GB190005142
22.12.1900 Dohm, Wilhelm (P) : An Improved Calculating Apparatus for Ascertaining the Section of Beams, Girders, Columns, and the like [6.77%]
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Patent:GB190008793
14.07.1900 Smith, Marmaduke Valentine (P) : Improved Date Calculator [29.96%]
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Patent:GB190023627
27.12.1900 Jennings, Richard Lanyon (P) : A circular, pocket, slide-rule for use in the timber trades [28.28%]
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Patent:GB190104011
23.11.1901 Pantsar Keicke : Improvements in Mechanical Adding and Calculating Apparatus [15.62%]
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Patent:GB190108309
23.04.1902 Farmar, Francis Charles (P) : A Slide-rule for all Calculating purposes in connection with Wines and Spirits [35.39%]
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Patent:GB190123886
13.11.1902 Dunlop, Henry Cleland (P) : An Improvement in the Slid-rule Consisting in the Provision of Elastic Supports or Runners which Allow the Slide to Work Freely under all [12.56%]
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Patent:GB190201679
01.05.1902 Hagyi-Ristic, Constantin (P) und Duffer, Artur (P) : Improvements in Calculating Apparatus [8.64%]
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Patent:GB190213957
16.10.1902 Masera, Silvio (P) : An Improved Slide-rule [53.96%]
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Patent:GB190227822
05.02.1903 Watkins, Alfred (P) : Improvements in Instruments for Calculating Photographic Exposures [15.02%]
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Patent:GB190321935
11.08.1904 Pugh, Evan Osmond Clark (P) : An Instrument for Calculating Trigonometrical Values [11.57%]
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Patent:GB190326520
06.10.1904 Samuel Emanuel : An Improved Calculating or Adding Machine [17.42%]
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Patent:GB190404010
30.06.1904 Moehlenbruck, Henri (P) : Improvements in Calculating Apparatus [18.97%]
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Patent:GB190417291
15.06.1905 Troeger, Karl Emil (P) : Slide-rule [20.44%]
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Patent:GB190507546
01.03.1906 Wimpenny, William Ernest (P) und Salomon, Alfred (P) : Improvements in and relating to Slide or like Rules for Calculating Interest on Investments [6.06%]
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Patent:GB190713447
12.03.1908 Flory, Lucy Gertrude (P) und Flory, Thomas Wass (P) : A Mechanical Calculating Machine for Adding Together or Totalling Simple or Compound Quantities [17.11%]
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Patent:GB190715435
24.10.1907 Cordingley, William George (P) : Improvements in Calculating Machines [16.49%]
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Patent:GB190800930
14.01.1909 Flory, Thomas Wass (P) und Cossor, Frank (P) : Improvements in Adding Machines [10.55%]
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Patent:GB190802706
08.02.1909 Leder, Ernst (P) : A New and Improved Calculating Machine [18.26%]
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Patent:GB190823729
05.11.1909 Randall, Frederick William (P), Schooling, William (P) : Improvements in Adding Machines [16.57%]
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Patent:GB190900621
18.03.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Improvements in Calculating Machines [15.83%]
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Patent:GB190906064
29.07.1909 Edge Douglas Ross und Hunter John Chalmers : Improvements in Weight Calculating Slide Rules [15.96%]
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Patent:GB190911029
09.12.1909 Oelschläger, Wilhelm : Improvements in Circular Slide Rules [29.18%]
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Patent:GB191005528
23.06.1910 Fowler, William Henry (P) : An Improved Calculator [27.22%]
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Patent:GB191116198
13.06.1912 Hills, William Donagan (P) : Improvements in or relating to Calculating Devices [10.95%]
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Patent:GB191119394
18.01.1912 Metall, Ind Schoenebeck A G (P) : Method of Fixing Celluloid Key Rings on to the Metal Keys of Typewriting, Calculating and other Key-board Machines [7.82%]
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Patent:GB191125313
14.11.1912 Pivoda, Franz (P) : Device for Calculating the Interest of a Principal [9.96%]
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Patent:GB191214853
14.11.1912 Avery, Charles Henry (P) : Calculating Apparatus [17.94%]
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Patent:GB191214901
26.06.1913 Cheape, John Albert (P) : Improvements in and relating to Calculating Machines [16.25%]
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Patent:GB191220416
27.02.1913 William Henry Fowler Harold Fowler : Improvements in circular calculators [26.53%]
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Patent:GB191315821
02.04.1914 Childs, Charles Vivian (P) : A Slide-rule for Structural Engineers [37.15%]
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Patent:GB191321879
24.09.1914 Smith, Arthur Eden (P) : Improved Apparatus for Calculating Wages [10.26%]
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Patent:GB191401782
10.06.1915 Pivoda, Franz (P) : Improvements in Calculating-apparatus for Determining Date Intervals [18.15%]
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Patent:GB191403638
21.05.1914 William Henry Fowler Harold Fowler : Improvements in circular calculators [24.86%]
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Patent:GB191415990
03.12.1914 William Henry Fowler Harold Fowler : An improved circular calculator [24.86%]
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Patent:GB191417274
15.04.1915 Wheatley Frederick Yeld : Parturition Calculator [6.47%]
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Patent:GB1919134833
29.04.1920 Fabrique des Montres Zénith : Improvements in circular slide rules [28.58%]
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Patent:GB195286
29.03.1923 Albert John Anido : Improvements in and connected with Slide Rules and the like [6.78%]
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Patent:GB196589
16.08.1923 A W Faber Castell (P) Bleistift Fa : Improvements in Slide Rules [14.55%]
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Patent:GB2009641
20.06.1979 Lohf & Tillipaul : Apparatus for Truing Grinding Wheels with an Involute Profile [19.36%]
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Patent:GB204156
27.09.1923 Francesco Nuschak : Improvements in nautical astronomy calculating apparatus [16.01%]
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Patent:GB2080589
03.02.1982 Burnett, William British Aerospace : Mechanical calculator [6.14%]
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Patent:GB210162
28.01.1924 Harry Price Tullis John Tullis and Son Ltd : An improved calculator for power transmission belting [15.88%]
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Patent:GB210265
31.01.1924 Shirley Brooks Ralston : Slide-rule or computing apparatus for calculating ship stability [20.81%]
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Patent:GB2110848
22.06.1983 Riehle, Harald (P) : Slide Rule [42.68%]
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Patent:GB213238
14.08.1924 Frappant Ag Fuer Praez S Und F : Improvements in Slide Rules or the like calculators [16.30%]
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Patent:GB2148564
30.05.1985 Duce Herbert John : Logarithmic calculating appliance [25.54%]
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Patent:GB214919
01.05.1924 Reginald Sidney Carr und William Ronald Fountaine Sange : An improved apparatus for calculating percentages [6.37%]
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Patent:GB2155672
25.09.1985 Zhang Tianze Tsinlien Trading Co Ltd : Slide rule [7.03%]
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Patent:GB215648
15.05.1924 Harold Fowler, William Henry Fowler : Improvements in circular calculators [27.85%]
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Patent:GB2157465
23.10.1985 Schwenzer Manfred, Zimmermann Eugen Harald, Fuhrmann Upat Max Langensiepen Kg : Apparatus for the determination of permissible loads upon dowels [13.81%]
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Patent:GB2157863
30.10.1985 Crane Ltd : Calculator for determining flowrate through a valve [24.37%]
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Patent:GB2167351
29.05.1986 Cheng Tien Fu, Chou Lung-Chiao : Ellipsograph Capable Of Drawing A Broken Line [11.24%]
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Patent:GB227643
22.01.1925 George Gouthwaite Scurfield : Improvements in and relating to Slide Rules or other logarithmically [10.91%]
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Patent:GB2292220
14.02.1996 Yeo Dennis George : Levelling aid [18.93%]
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Patent:GB230199
12.03.1925 Frederick William Henning : Improvements in and relating to calculating apparatus [11.43%]
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Patent:GB232030
16.04.1925 Chad Valley Company Ltd : A new or improved calculator or score card for use more particularly in conjunction with the playing of games [22.94%]
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Patent:GB240206
01.10.1925 Wilfred Ernest Jones : Improved calculating device for the use of printers [6.68%]
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Patent:GB241908
17.06.1926 : [7.90%]
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Patent:GB243575
03.12.1925 Charles Neal Guy S Calculating Machines Ltd : Improvements in or relating to calculating machines [11.07%]
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Patent:GB248959
18.03.1926 Thomas Frederick Stent Edison Swan Electric Co Ltd : Calculating devices [6.71%]
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Patent:GB253758
24.06.1926 Addison, Herbert (P), William Blaine Luard : An apparatus for the mechanical solution of certain trigonometrical problems [6.67%]
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Patent:GB254153
01.07.1926 Philip Ray Coursey : Improvements relating to logarithmic calculating-apparatus [25.36%]
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Patent:GB256903
19.08.1926 Frederick Ainsworth Robinson Lancashire Optical Mfg : Improvements in and relating to circular calculators [27.42%]
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Patent:GB265752
17.02.1927 Sabatini, Washington (P) : Device for working out calculations in connection with structures of [16.86%]
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Patent:GB268243
31.03.1927 Frederick Henry Haynes : Calculator for readily determining the relationship between wavelength, inductance and capacity in electrical circuits [40.69%]
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Patent:GB279356
27.10.1927 Sergius Tanton : Apparatus for converting into the decimal system values calculated in [7.84%]
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Patent:GB290746
21.05.1928 Ruben Brusch : Calculating cylindrical slide rules with slider [27.93%]
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Patent:GB291324
31.05.1928 : Improved Ellipsograph [17.39%]
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Patent:GB292223
14.06.1928 Jonas Harald Faxen : Improvements in and relating to calculating discs [12.86%]
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Patent:GB326860
24.03.1930 Blezzard, Fred (P) Chas Macintosh and Company Ltd : A new or improved calculating device [16.34%]
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Patent:GB328455
01.05.1930 Harald, Odegaarden (P) : Improvements in or relating to calculating devices [12.65%]
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Patent:GB342355
02.02.1931 Dall, Horace Edward (P) & George Kent Ltd : Improvements in Planimeters [6.51%]
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Patent:GB356434
10.09.1931 Sydney Herbert Stelfox : Improvement in the construction of slide+rules [16.41%]
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Patent:GB358212
08.10.1931 Eric Cross : Improvements in or relating to calculating devices [6.46%]
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Patent:GB359578
29.10.1931 Beddington,Thomas Alfred Herbert (P) : Totalisator odds calculator [11.62%]
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Patent:GB360854
11.11.1931 William Muncaster Lovatt : Wind allowance calculator for use in shooting [15.05%]
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Patent:GB362770
10.12.1931 Leslie Ernest Brougham : Improvements in or relating to statistical calculating and like machines controlled by mechanical records [15.92%]
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Patent:GB364298
07.01.1932 Henry Osborne Brierly : Improvements in Slide Rules [10.67%]
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Patent:GB373630
23.05.1932 Cedric Marrold Gibson : Improvements in or relating to calculating apparatus [16.58%]
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Patent:GB382242
20.10.1932 Thomas Walter Hall : Improvements relating to calculating devices [16.63%]
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Patent:GB382589
27.10.1932 Montres Zenith Fab Des : A calculating device for the record diagrams of apparatus recording periods of operation of machines or vehicles [15.02%]
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Patent:GB393828
15.06.1933 Petschenig, Karl (P) Optische Anstalt C. P. Goerz (P) : Improvements in range and direction calculating apparatus for artillery [16.80%]
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Patent:GB406488
01.03.1934 Henryk Sonabend : Improvements in and relating to maps [6.83%]
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Patent:GB412312
28.06.1934 Otto Brachvogel : Improvements in combined tape measures and Slide Rules [6.47%]
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Patent:GB413308
09.07.1934 Algernon William Dargue, Frederick Lewin Dargue : Improvements in or relating to longitudinal slide+rules [19.44%]
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Patent:GB414810
16.08.1934 George Ian Young Carfax Cards Ltd : Improved scoring device for card and other games [10.89%]
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Patent:GB424489
22.02.1935 Richardson, Herbert Winser (P), Richardson, Sidney (P) : Improvements in and relating to devices for facilitating the marking up of scores at bridge or other games [14.74%]
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Patent:GB424863
01.03.1935 A W Faber Castell (P) : Improvements in or relating to cursors for Slide Rules [21.91%]
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Patent:GB443689
04.03.1936 Dussel, Cornelis Jan (P) & Pasveer, Jan (P) : Circular Slide Rule [25.74%]
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Patent:GB464234
14.04.1937 Friedrich Simon : Improvements in or relating to calculating devices [14.27%]
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Patent:GB466017
18.05.1937 Eric Geoffrey Mcgeorge : A calculating device [15.80%]
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Patent:GB473659
18.10.1937 Tauno Nykaenen : Apparatus for use in the laying of ordnance [6.33%]
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Patent:GB504276
24.04.1939 Leslie John Derrington : A scoring device for such games as darts [33.08%]
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Patent:GB514237
02.11.1939 Riccardo Levi Olivetti (P) S A M O A : Improved impression-device for printing-adding machines [10.68%]
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Patent:GB529555
22.11.1940 Louis William Johnstone : Improved ready reckoner device [6.51%]
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Patent:GB530527
13.12.1940 Daemen, Walter (P) : Improvements in or relating to circular Slide Rules [20.49%]
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Patent:GB534855
20.03.1941 Ben Secker Standard Telephones : Improvements in or relating to Slide Rules [17.23%]
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Patent:GB549029
03.11.1942 Fred Rick Westerman Rabarts, John Christopher Clifton Vickers Amstrongs Ltd : Improvements in apparatus for the measurement of quantities related to the dimensions of visual impressions [15.41%]
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Patent:GB557079
03.11.1943 Gower Bouverie Raynor Pimm : Improvements relating to slide-rule calculators [51.53%]
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Patent:GB557895
09.12.1943 Goudime-Levkovitsch, Paul (P) : Improvements relating to computers of the slide rule type [45.69%]
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Patent:GB564520
02.10.1944 Clarence Willans Heath Belling and Lee Ltd : A calculating device for performing industrial quality control calculations [32.62%]
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Patent:GB567395
13.02.1945 John Donald MacLean : Air navigation computor [13.40%]
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Patent:GB567915
08.03.1945 John Donald MacLean : Improvements in Slide Rules and other calculators [17.67%]
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Patent:GB569247
15.05.1945 Robert Townend Vickers Electrical Co Ltd : Improvements in computating devices for photography [13.92%]
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Patent:GB572564
15.10.1945 John Morton Devereux Wood : Improvements in or relating to apparatus for directing gun fire [15.72%]
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Patent:GB573095
06.11.1945 Ernest Bates : Improvements in or relating to calculators for the solution of triangles [26.54%]
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Patent:GB573520
23.11.1945 Alexander Bowden Carr : Slide rule for the computation of income tax on earned incomes [7.17%]
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Patent:GB575332
13.02.1946 Alfred Wilson Sinclair Fraser and Glass Ltd : Improvements in or relating to Slide Rules or calculators [21.36%]
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Patent:GB578558
03.07.1946 George Marsden MacDonald : Improvements in logarithmic calculators [17.50%]
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Patent:GB581732
23.10.1946 John Bryant Digby De Mahe : Calculating apparatus [16.78%]
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Patent:GB582145
06.11.1946 Gerard Francis Wittgenstein : Improvements in and relating to a logarithmic calculator [28.17%]
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Patent:GB584532
16.01.1947 Dahlberg, Oscar (P) : Improvements in instruments for calculating variations in the altitude of the sun [16.98%]
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Patent:GB600877
21.04.1948 Arne Blom Bakke E, R Watts and Son Ltd : Improvements in and relating to calculating apparatus [17.23%]
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Patent:GB627871
17.08.1949 Frederick Edward Lanegan W H Smith and Son Ltd : Improvements in or relating to pinwheel devices for feeding stationery through typewriters and like machines [16.01%]
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Patent:GB644944
18.10.1950 Manyweathers, Leslie (P) Blundell (P) Rules Ltd : Slide Rule [6.63%]
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Patent:GB647245
06.12.1950 Ronald Stewart Nunn : Spiral gear calculator [6.76%]
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Patent:GB649488
24.01.1951 Edric Raymond Brooke : Improvements in calculating apparatus [16.42%]
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Patent:GB650033
14.02.1951 Batori, Oscar Eugene (P) : Navigational and industrial computer of the slide rule type [15.61%]
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Patent:GB667706
05.03.1952 : educational Device for teaching multiplication and division [17.73%]
-
Patent:GB682740
12.11.1952 Franz Josef August Huber : True air-speed computer [17.14%]
-
Patent:GB702341
13.01.1954 Richard Siddall, Albert Louis Noblett : Improvements in or relating to draughting means or appliances [9.65%]
-
Patent:GB707487
14.01.1952 Herzstark, Curt (P) : Calculating-apparatus [14.02%]
-
Patent:GB707645
21.04.1954 Olympia (P) Werke West GmbH : Printing mechanisms for calculating and like machines [17.25%]
-
Patent:GB707740
21.04.1954 Harold Alexandre Babington : Improvements in or relating to circular Slide Rules for making calculations relating to speed, time, and distance [27.94%]
-
Patent:GB708867
12.05.1954 Michael John Quillinan : Slide rule [13.74%]
-
Patent:GB714205
25.08.1954 Frederick John Chambers : Improvements in logarithmic computing devices [16.50%]
-
Patent:GB742255
21.12.1955 Continental Silver Co Inc : Improvements in apparatus for calculating the volume, weight, density and/or transitcharge of an object or package [18.02%]
-
Patent:GB778633
10.07.1957 Fred William Hoch : Improvements in or relating to slide-rules [16.32%]
-
Patent:GB782873
11.09.1957 Charles John Broadhurst : Improvements in Slide Rules [12.71%]
-
Patent:GB799404
06.08.1958 Isaac Kleiner : Knitters calculating disc [16.55%]
-
Patent:GB808372
04.02.1959 Claude Marsan : Slide rule or similar educational appliance [16.17%]
-
Patent:GB809930
04.03.1959 Farlie, Dennis John Gerald (P) Gen Electric Co Ltd : Improvements in or relating to calculating devices [17.06%]
-
Patent:GB815464
24.06.1959 John Leslie Boyce : A dimension calculator for use in the bending of metal sheet and strip [16.18%]
-
Patent:GB841528
20.07.1960 Harold Alexandre Babbington Bl : Improvements in or relating to instruments of the slide-rule or like type for makingcalculations appertaining to time, speed and distance [16.33%]
-
Patent:GB849233
21.09.1960 Joseph Stephen Shortt : Improved apparatus for calculating intensity of illumination [33.13%]
-
Patent:GB851003
12.10.1960 Harold Alexandre Babbington Bl : Improvements in or relating to calculating instruments of the slide-rule or like type for making calculations relating to speed, time and dis [19.34%]
-
Patent:GB923305
10.04.1963 Thomas John Le Cheminant : A device to measure discounts and profits and for use in sundry other [28.19%]
-
Patent:GB935584
28.08.1963 Sidney Lidderdale Scarlett Armstrong Cork Company Ltd : Improvements in or relating to Slide Rules [6.99%]
-
Patent:GB936130
04.09.1963 Bird, Michael (P) Television Audience Measuremen : Improvements in or relating to calculating instruments [12.36%]
-
Patent:GB955208
15.04.1964 Cameron, James Adam (P) J B and S Lees Ltd : A device for calculating the weight of a coil of strip material [21.76%]
-
Patent:GB971192
30.09.1964 Margit Hickson : Improvements in or relating to slide-rule calculating devices [13.69%]
-
Patent:GB976282
25.11.1964 Kienzle (P) Apparate GmbH : Taximeter or like calculating machine [6.45%]
-
Patent:GB984996
03.03.1965 Cyrille Robert Philippe Lazare : Improvements in and relating to calculating apparatus [15.82%]
![](/upload/flags/flagicon-US.gif)
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Patent:US1003672
19.09.1911 F. J. Tillman : Adding Machine [4.26%]
-
Patent:US1004339
26.01.1911 Avery, Harold (P) : Calculating Apparatus [11.06%]
-
Patent:US1007910
07.11.1911 F. J. Baker : Ellipsograph Machine [3.92%]
-
Patent:US1009493
21.11.1911 J. A. Ettler : Combined Record Book and Slide Rule [5.81%]
-
Patent:US1017719
20.02.1912 H. R. Watts : Circular Slide Rule [30.13%]
-
Patent:US1021484
26.03.1912 G. W. Richardson : Slide Rule [5.89%]
-
Patent:US1023961
23.04.1912 L. A. Quivey : Instrument for Obtaining Averages [8.13%]
-
Patent:US1026560
14.05.1912 L. Burke : Ellipsograph [10.64%]
-
Patent:US1028237
04.06.1912 A. N. Lurie : Slide Rule [11.01%]
-
Patent:US1038774
17.09.1912 F. L. Manny : Computing Machine [4.27%]
-
Patent:US1039245
24.09.1912 C. A. Bishop : Calculating Instrument [3.66%]
-
Patent:US1055303
04.03.1913 W. S. Elliott : Ellipsograph [11.90%]
-
Patent:US1056775
25.03.1913 D. W. Erunton : Circular Slide Rule [23.24%]
-
Patent:US1058148
08.04.1913 W. S. Buvinger : Calculating Instrument [3.64%]
-
Patent:US1061819
13.05.1913 M. L. Cleary : Calculator [13.26%]
-
Patent:US1062321
20.05.1913 J. W. Buzzel : Sliding Rule [6.69%]
-
Patent:US1064747
17.06.1913 J. W. Ledoux : Liquid Meter [5.10%]
-
Patent:US106701
23.08.1870 F. T. Leilich : Adding Machine [4.86%]
-
Patent:US1072153
02.09.1913 Ott, Ludwig (P), Ott, Herrmann (P) Ott (P) : Integrator [6.42%]
-
Patent:US1074347
30.09.1913 A. G. Black : Calculating Register [6.82%]
-
Patent:US1075003
07.10.1913 M. Barr & E. R. Clarke : Calculating Machine [10.54%]
-
Patent:US1075124
07.10.1913 J. A. Scheibli : Slide Disk Calculator [11.75%]
-
Patent:US1080245
02.12.1913 Baldwin, Frank Stephen (P) : Calculating Machine [6.59%]
-
Patent:US1080811
09.12.1913 W. C. Colwell : Slide rule [20.36%]
-
Patent:US1083991
13.01.1914 F. N. Connet : Indicating, Integrating, and Recording Manometer [9.47%]
-
Patent:US1085755
03.02.1914 T. F. Pearson : Cash Register [4.10%]
-
Patent:US1088175
24.02.1914 W. O. Philips : Slide Rule [10.35%]
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Patent:US1095545
05.05.1914 Baum, Michel (P) und Wimmer, Josef (P) : Adding Machine [3.44%]
-
Patent:US1095674
16.10.1911 Reller, Edwin L. (P) Duco (P) : Accumulator for Calculating Machines [3.70%]
-
Patent:US1099009
02.06.1914 R. C. Bennet : Calculator or Abacus [7.14%]
-
Patent:US1103923
14.07.1914 F. N. Connet : Speed Changing Device [4.27%]
-
Patent:US1104844
28.07.1914 I. G. Sundell : Navigators Apparatus [5.03%]
-
Patent:US110520
27.12.1870 F.F. Warner : Adding Machine [5.73%]
-
Patent:US1108480
25.08.1914 H. W. Tomlinson : Slide Rule [21.15%]
-
Patent:US1115950
03.11.1914 R. H. Marchant Marchant (P) : Calculating Machine [3.79%]
-
Patent:US1123007
26.01.1914 Reller, Edwin L. (P) Duco (P) : Mechanism for Positioning the Zero Types of Accumulator Wheels for Printing [3.48%]
-
Patent:US1128289
16.02.1915 G. B. Cirigliano : Compasses for Describing Ellipses [10.38%]
-
Patent:US1128718
16.02.1915 P. E. Parsons : Miter Box and Calculator [3.61%]
-
Patent:US1129872
02.03.1915 K. Keeler : Planimeter [3.98%]
-
Patent:US1142182
08.06.1915 P. F. W. C. Krippendorf : Computing Device [6.76%]
-
Patent:US1154619
28.09.1915 C. F. Dieckmann : Slide Rule [10.72%]
-
Patent:US1157526
19.10.1915 Clair. A. Gilson Gilson Slide Rule Co (P) : Slide Rule [7.92%]
-
Patent:US1157609
19.10.1915 C. F. Backstrand & C. M. Hoag : Calculator [15.81%]
-
Patent:US1159408
09.11.1915 G. R. Moore : Adding Device [3.81%]
-
Patent:US1160742
13.04.1912 Meier, Albert J. (P); Swift, William L. (P); Reller, Edwin L. (P) Duco (P) : Cleaning and Transfer Mechanism for Calculating Machines [3.91%]
-
Patent:US1168059
11.01.1916 G. R. F. H. Cuntz : Slide Rule Calculator [18.94%]
-
Patent:US1168546
18.01.1916 C. F. Odin : Curve Scriber [12.67%]
-
Patent:US117169
18.07.1871 E. M. Hamilton : Adding Machine [5.74%]
-
Patent:US11726
26.09.1854 Aaron L. Hatfield, Lewisburgh, Pa. : Machines for adding numbers [7.14%]
-
Patent:US1173395
29.02.1916 C. H. Taylor : Meter [8.41%]
-
Patent:US1180930
25.04.1916 H. L. Kirkpatrick : Adding Device [10.26%]
-
Patent:US1188108
20.06.1916 W. H. Smith : Calculating Machine [8.54%]
-
Patent:US1209349
19.12.1916 M. Stevens : Interest Computing Device [4.94%]
-
Patent:US1214040
30.01.1917 J. T. Jones : Calculating Instrument [13.90%]
-
Patent:US1226064
15.05.1917 G. Cordts : Adding Machine [7.30%]
-
Patent:US1229522
12.06.1917 C. R. Rings : Computing Device [9.22%]
-
Patent:US1230994
26.06.1917 J. A. Caldwell : Means for Describing Circular and Elliptic Arcs [15.36%]
-
Patent:US1232066
03.07.1917 J. B. Moody : Calculating Device [3.86%]
-
Patent:US1234758
31.07.1917 G. G. Heghinian : Calculating Machine [11.95%]
-
Patent:US1250379
18.12.1917 F. O. Stillman & H. M. Schleicher : Slide Rule [12.07%]
-
Patent:US1255939
12.02.1918 Small, Gilbert (P) : Pocket Calculator [11.92%]
-
Patent:US1256234
12.02.1918 F. R. Innes : Mechanism for Integrating Power Current Values [4.29%]
-
Patent:US1275818
13.08.1918 R. E. Woolley : Measuring Instrument [5.06%]
-
Patent:US1278994
17.09.1918 F. E. Pendleton : Variable Speed Power Transmission Device [6.65%]
-
Patent:US1279798
24.09.1918 W. A. Warman : Slide Rule [16.94%]
-
Patent:US1286112
26.11.1918 Robertson, William Henry (P) : Calculating Device [11.57%]
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Patent:US1322770
25.11.1919 W. Eastwood : Measuring Instrument [14.54%]
-
Patent:US1327320
06.01.1920 C. W. Gooch : Adding Machine [3.94%]
-
Patent:US1329902
03.02.1920 Hemmi, Jiro (P) : Slide Rule [12.77%]
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Patent:US1331561
24.02.1920 Ensign, Emory (P) Bleick Syndicate : Drive for calculating-machines [3.63%]
-
Patent:US1333277
09.03.1920 Niemann, Frederick (P) Adolph Felt und Tarrant (P) : Printing cut-out for adding-machines [3.74%]
-
Patent:US1338588
27.04.1920 F. L. Prescott : Calculating Device [10.43%]
-
Patent:US1344190
22.06.1920 Carlos Ruiz : Fraction-adding machine [7.79%]
-
Patent:US1349081
10.08.1920 Middleton Charles S : Interest Calculator [3.99%]
-
Patent:US1349628
17.08.1920 E. E. Phinney : Over Rotation Check for Calculating Machine Gears [4.87%]
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Patent:US1364154
04.01.1921 F. O. Stillman and H. M. Schleicher : Slide Rule [7.07%]
-
Patent:US1369145
22.02.1921 Thomas Edward G Toledo Scale Co : Price-calculating weighing-scale [3.97%]
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Patent:US137107
25.03.1873 Stephenson, Archibald (P), Manteno, Ill. : adding machine [7.51%]
-
Patent:US1383296
05.07.1921 Desire Giot Henri Louis Victor : Star-transit calculator and indicator for mariners [8.62%]
-
Patent:US1398914
29.11.1921 Pierce Robert A : Slide-rule [7.26%]
-
Patent:US1399450
06.12.1921 Trinks, Franz (P) : Paper-strip feed for adding-machines [4.05%]
-
Patent:US1400363
13.12.1921 M. B. And V. C. Kennedy : Computing Machine [4.39%]
-
Patent:US140146
24.06.1873 G. Linderoos : Adding Machines [10.94%]
-
Patent:US1401692
27.12.1921 W. E. Harris : Calculating Device [7.36%]
-
Patent:US1404019
17.01.1922 C. A. Gilson Gilson Slide Rule Co (P) : Mechanical Calculating Device [12.84%]
-
Patent:US1405333
31.01.1922 H. Ritow : SlideRule [26.74%]
-
Patent:US1405847
07.02.1922 G. D. Johnson : Computing Device [16.51%]
-
Patent:US1406863
14.02.1922 S. Hoffman, J. Schwartz, and I. Holden : Drawing Instrument [5.86%]
-
Patent:US1410507
27.01.1917 Ray, Walter T. (P) : Calculating Machine [5.57%]
-
Patent:US1414855
02.05.1922 R. E. Bishop : Time Meter [6.21%]
-
Patent:US1418947
06.06.1922 J. E. Lysen : Calculator [9.68%]
-
Patent:US1423437
18.07.1922 W. W. Lasker : Carriage Operating Mechanism [3.78%]
-
Patent:US1423896
25.07.1922 W. L. Wyckoff : Calculating Rule [6.70%]
-
Patent:US1424194
01.08.1922 H. and F. Brotherton : Device for Calculating or Computing Purposes [4.14%]
-
Patent:US1426829
22.08.1922 G. R. Flynn : Calculating Device [15.55%]
-
Patent:US1428065
05.09.1922 Tidswell, Hubert Royds (P) : Sex Calculator [4.09%]
-
Patent:US1429264
19.09.1922 J. W. Wright : Calculating Guy Rule [6.57%]
-
Patent:US143184
23.09.1873 S. Pool : Adding Machine [5.71%]
-
Patent:US1435422
14.11.1922 R. Schiske : Kilometer per Liter Register [14.52%]
-
Patent:US1435512
14.11.1922 A. S. Boggio : Calculator [4.87%]
-
Patent:US1437298
28.11.1922 G. R. Fickert : Belt Calculator [11.00%]
-
Patent:US1438144
05.12.1922 Stevenson Robert A : Toy calculator [8.49%]
-
Patent:US1447309
06.03.1923 S. V. Johnson : Calculating Device [6.71%]
-
Patent:US1455339
15.05.1923 J. F. Keller et al : Circular Slide Rule [11.59%]
-
Patent:US1456061
22.05.1923 Edward Squire Cecil Thompson Jowett : Calculating Machine [3.59%]
-
Patent:US1459886
26.06.1923 K. R. Hammond : Computing Machine [3.58%]
-
Patent:US1473573
06.11.1923 H. Foley : Calculating Device [14.86%]
-
Patent:US1476489
04.12.1923 Carver James H Gen Electric : Calculator for gears [11.73%]
-
Patent:US1486203
11.03.1924 H. Thun : Apparatus for the Measurement of Plane Surfaces [3.91%]
-
Patent:US1487069
18.03.1924 J. L. Landenberger : Adding Machine [6.74%]
-
Patent:US1487460
18.03.1924 Halvor Hansson : Calculating Device [8.35%]
-
Patent:US1487805
25.03.1924 A. F. Puchstein : Device for making Vector Calculations [10.62%]
-
Patent:US1488641
01.04.1924 W. Johnson : Instrument for Describing Ellipses [3.76%]
-
Patent:US1495805
27.05.1924 W. R. Rooney : Date Calculating Chart [4.95%]
-
Patent:US1497570
25.08.1923 F. Leitner : Adding Machine [10.22%]
-
Patent:US1498309
17.06.1924 W. H. Smith : Calculating Machine [10.13%]
-
Patent:US1503171
29.07.1924 Stinson Harold S : Adding Machine [3.63%]
-
Patent:US1506112
26.08.1924 M. B. Cutshaw : Calculator [4.59%]
-
Patent:US1510917
07.10.1924 Bindschedler, Theodore (P) Burroughs (P) : Time switch for adding machines [3.86%]
-
Patent:US1514323
04.11.1924 Kirchner John J : Sine and angle calculator [4.93%]
-
Patent:US1520873
30.12.1924 C. C. Lauritsen : Measuring and Integrating Mechanism [4.05%]
-
Patent:US152670
30.06.1874 C.C. Moore & J.B. Moore : Adding Machine [6.73%]
-
Patent:US1532014
31.03.1925 F. Wömpner : Slide Rule [6.34%]
-
Patent:US1532115
07.04.1925 B. F. Barker : Typewriting Machine [12.12%]
-
Patent:US1532832
07.04.1925 J. F. Mays : Calculating Machine [3.25%]
-
Patent:US1533045
07.04.1925 Eliot S. Staples : Adding Machine [4.04%]
-
Patent:US1536574
05.05.1925 Du Mond Jesse William Munroe : Calculating Device [6.10%]
-
Patent:US1536693
05.05.1925 Schneider Frank A : Tabular calculator [4.93%]
-
Patent:US1541871
16.06.1925 F. O. Stillman : Logarithmic Calculating Device [19.68%]
-
Patent:US1550702
25.08.1925 R. F. Knight : Measuring Apparatus [9.35%]
-
Patent:US1557163
13.10.1925 W. B. Hodge : Sling Psychrometer [10.68%]
-
Patent:US1560747
10.11.1925 Weinbach Mendel P : Vector calculator [10.17%]
-
Patent:US1568475
05.01.1926 R. Schwanda : Slide Rule [4.57%]
-
Patent:US1571728
02.02.1926 Macfarren Samuel J : Calculator [8.92%]
-
Patent:US1572547
09.02.1926 R. W. Mallder : Calculator [6.60%]
-
Patent:US1597483
24.08.1926 H. Ritow : Slide Rule [27.10%]
-
Patent:US1599904
14.09.1926 P. Lötzbeyer : Calculating Device in the Form of a Slide Rule [17.10%]
-
Patent:US1605355
02.11.1926 Smith Lee : Slide Rule [6.54%]
-
Patent:US1605922
09.11.1926 Cook George, Thomas Monahan : Slide Rule [12.17%]
-
Patent:US1609972
07.12.1926 Sherrer Frederick, Hess Victor United States Radium Corp : Slide Rule [6.00%]
-
Patent:US1618788
22.02.1927 G. L. Terna : Drafting and Lay-Out Instrument [3.78%]
-
Patent:US1630291
31.05.1927 C. B. Carson : Indicating Instrument [9.78%]
-
Patent:US1637507
02.08.1927 A. N. Zavango : Compass [8.20%]
-
Patent:US1638984
16.08.1927 Cunningham Arthur B : Radial averaging Planimeter [8.34%]
-
Patent:US1661095
28.02.1928 Eugene Rowe Joseph : Calculating Instrument [6.46%]
-
Patent:US1663726
27.03.1928 Pfeifer, John (P) Kel-San (P) Mfg. Co. : Adding Machine [6.45%]
-
Patent:US1678019
24.07.1928 Oates Norford L : Calculating Device [5.17%]
-
Patent:US1682901
04.09.1928 Friden, Carl Mauritz Fredrick (P) : Reversing Mechanism [4.13%]
-
Patent:US1686351
02.10.1928 J. M. Spitzglass : Coal Meter [3.87%]
-
Patent:US1701436
05.02.1929 Baker Harry E : Punching mechanism for use with adding machines [4.00%]
-
Patent:US172270
18.01.1876 B. Kilbourn : Calculators for Manufacturers of picture-Frames [7.94%]
-
Patent:US1732434
22.10.1929 C. A. Dawley : Meter [3.56%]
-
Patent:US174434
07.03.1876 F. A. Polsley : Machine for Describing and Cutting Regular Curves [6.48%]
-
Patent:US1748783
25.02.1930 Mcgaughy John B : Gas-orifice meter-chart calculating machine [3.50%]
-
Patent:US1764915
10.09.1928 Vethe, Anders (P) Addometer (Reliable) : calculating apparatus [3.88%]
-
Patent:US1774177
26.08.1930 E. Harris : Calculating Device [4.19%]
-
Patent:US1777430
07.10.1930 C. E. A. Claus : Typewriter Calculating Machine [4.41%]
-
Patent:US1780078
28.10.1930 M. P. Hite : Calculating Device [6.93%]
-
Patent:US1803185
28.04.1931 M. P. Hendricks : Calculating Device [8.05%]
-
Patent:US1811397
23.06.1931 L. W. Langford : Record Making Mechanism [4.08%]
-
Patent:US1814462
14.07.1931 Trenor Albert und John Hays Hammond : Torpedo course calculator [3.92%]
-
Patent:US1817221
04.08.1931 C. A. Young : Combination Lock Adding Bank [6.81%]
-
Patent:US1825444
29.09.1931 Alfons Dietrich : Ellipsograph [4.06%]
-
Patent:US1827890
20.10.1931 Horton, Allen (P) Burroughs (P) : Calculating Machine [4.18%]
-
Patent:US1829036
27.10.1931 L. A. Biehler : Integrating Device [5.97%]
-
Patent:US1830413
03.11.1931 F. Wagner et al : Measuring Apparatus [6.04%]
-
Patent:US1832791
17.11.1931 Rudin, Karl Viktor (P) : Calculating Machine [6.02%]
-
Patent:US1837912
22.12.1931 Mann Robert : Ellipsograph [8.43%]
-
Patent:US184177
07.11.1876 J. C. Rorick : Bevel-Square [6.44%]
-
Patent:US1844564
09.02.1932 H. M. Davis : Averaging Appliance [4.01%]
-
Patent:US1844905
09.02.1932 Schweydar, Wilhelm (P) Askania (P) : Planimeter for computing forces [10.59%]
-
Patent:US1849058
15.03.1932 J. R. Dempster Rotarule : Circular Slide Rule [16.74%]
-
Patent:US1853740
12.04.1932 Otto Mueller : Aircraft course calculator [7.72%]
-
Patent:US1855523
26.04.1932 Adolph Langsner Dietzgen (P) : Slide Rule indicator [6.14%]
-
Patent:US1861618
07.06.1932 Nelson White Morse Products Inc : Electric drive for adding machines [4.29%]
-
Patent:US1864967
28.06.1932 F. Wagner et al : Measuring Apparatus [3.49%]
-
Patent:US1866133
05.07.1932 F. L. Simon : Educational Device [4.91%]
-
Patent:US18711
24.11.1857 James D. Smith, Brantingham, N.Y. : Calculating Device [14.62%]
-
Patent:US187114
06.02.1877 C. C. Fields : Adding Pencil [5.37%]
-
Patent:US1872973
23.08.1932 J. J. Kittel : Ellipsograph [7.69%]
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Patent:US1875485
06.09.1932 Y. Okada : Belt Conveyer Scale or the like [10.80%]
-
Patent:US1877435
13.09.1932 Trenor Albert D John Hays Hammond Jr : Course calculator [6.77%]
-
Patent:US1879116
27.09.1932 Philip Dalton : Calculating Goniometer [3.78%]
-
Patent:US1881165
04.10.1932 F. V. Becker : Calculating Instrument [5.61%]
-
Patent:US1881204
04.10.1932 Jacob Lundgren Tinius Olsen Testing Machine C : Device for calculating radial forces [4.28%]
-
Patent:US1883037
18.10.1932 E. A. Snook : Bridge Score Tabulator [9.94%]
-
Patent:US1885149
01.11.1932 J. C. Sommer : Combination Drawing Instrument [9.11%]
-
Patent:US1892183
27.12.1932 H. H. Gorrie : Integrating Mechanism [3.81%]
-
Patent:US1893090
03.01.1933 A. Kreidler : Indicating Device [4.06%]
-
Patent:US1893235
03.01.1933 E. C. Iverson : Navigational Instrument [4.12%]
-
Patent:US1894294
17.01.1933 A. Langsner : Slide Rule [6.29%]
-
Patent:US1904474
18.04.1933 Keuffel, Adolf W. (P) Keuffel and Esser (P) : Slide Rule [6.70%]
-
Patent:US1918188
11.07.1933 G. P. Luckey : Altimeter Temperature Correction Computer [8.14%]
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Patent:US1918723
18.07.1933 Harold Thayer Charles : Calculating device for use with three-phase wattmeters [4.12%]
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Patent:US1927269
19.09.1933 G. Lerch : Calculating Machine [4.08%]
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Patent:US1935021
14.11.1933 Teodor Engblom John Fredrik, Wilfrid Wilman Charles : Calculating or indicating apparatus [6.09%]
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Patent:US1938074
05.12.1933 R. Lanquetin : Apparatus for Indicating the Ratio between the Linear Function of two Temperatures [18.64%]
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Patent:US1940177
19.12.1933 N. J. Meagher : Computing Instrument [29.42%]
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Patent:US1949706
06.03.1934 Barrett, Glenn (P) Portable Adding Machine Company : Manual clear signal device for adding machines [10.67%]
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Patent:US1953328
03.04.1934 R. E. Woolley : Integrating Mechanism [3.82%]
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Patent:US1954723
10.04.1934 Cloud Harry B : Calculating system and apparatus therefor [7.81%]
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Patent:US1957950
08.05.1934 Friden, Carl Mauritz Fredrick (P) : Calculating Machine [4.17%]
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Patent:US1958970
15.05.1934 Luttropp, Conrad (P), Anders Lindahl : Calculating Machine [3.88%]
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Patent:US1961295
05.06.1934 M. P. Hite : Calculating Device [6.34%]
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Patent:US1962866
12.06.1934 L. A. Graham : Calculating Device [14.07%]
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Patent:US1969966
14.08.1934 F. J. Curtis : Liquid Measuring Device [4.03%]
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Patent:US1988357
15.01.1935 Hounsfield, Leslie (P) : Planimeter [3.91%]
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Patent:US1988904
22.01.1935 Joseph Krell : Address printing and calculating machine [8.82%]
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Patent:US199289
15.01.1878 William Hart : Calculator [11.50%]
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Patent:US1994843
19.03.1935 J. A. Weishampel : Planimeter [6.66%]
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Patent:US2003783
04.06.1935 Fuller, Frederick (P) IBM (P) : Accounting Machine [3.69%]
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Patent:US2004282
11.06.1935 Horton, Allen (P) Burroughs (P) : Driving mechanism for calculating machines [3.74%]
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Patent:US2011240
13.08.1935 Fields Norman W : Demurrage calculator [3.82%]
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Patent:US201617
26.03.1878 J. Kachelman Jr. : Perpetual Time and Interest Calendar [8.53%]
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Patent:US2019708
05.11.1935 Bradley Jones : Course calculating instrument [13.58%]
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Patent:US2028052
14.01.1936 Easterly John I : Combination square and Slide Rule [7.19%]
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Patent:US2034027
17.03.1936 C. A. Decary et al : Fecundity Calculating Device [8.48%]
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Patent:US2037356
14.04.1936 F. Von Schütz : Multiplying Gear [4.01%]
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Patent:US2048819
28.07.1936 A. E. Russ : Computing Apparatus [4.04%]
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Patent:US2053019
01.09.1936 Warren Bagley James : Aerial photograph calculator [10.90%]
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Patent:US2058496
27.10.1936 R. H. Paul : Game Scorer [14.69%]
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Patent:US2063287
08.12.1936 H. A. Aikins : Calculating Device [3.71%]
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Patent:US2067068
05.01.1937 J. L. Taylor : Calculator [6.26%]
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Patent:US2068899
26.01.1937 Erik Anneren Rolf, Carlström, Bengt Facit (P) : Calculating Machine [3.81%]
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Patent:US2071195
16.02.1937 Lindley Bowles Edward : Slide Rule [21.31%]
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Patent:US2071425
23.02.1937 Papello, Karl (P) Firm N V Nl Instr Cie Nedinsco : Calculating apparatus for firing directors for shooting at moving aerial targets [10.26%]
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Patent:US2074006
16.03.1937 E. J. Von Pein : Scale Controlled Recorder [7.75%]
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Patent:US2079464
04.05.1937 H. Okura : Hyperbolic Scale Rule [8.05%]
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Patent:US2080587
18.05.1937 Nicholas Sinitxin-White, John L R Glover, Nicholas N Solovioff : Calculating Device [10.46%]
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Patent:US2082008
01.06.1937 Kauffman William J : Calculating and indicating mechanism [6.19%]
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Patent:US2082697
01.06.1937 I. M. Ingerson : Keying Device [3.73%]
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Patent:US2083233
08.06.1937 R. Landenberger : Securing Device [12.65%]
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Patent:US2086425
06.07.1937 G. B. Linderman, Jr. : Integrating Apparatus [6.13%]
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Patent:US2087446
20.07.1937 F. E. Proal : Slide Rule for Use in Gear Calculatings [6.47%]
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Patent:US2088533
27.07.1937 Phelps Wilbur, Harold C James : Calculating Device [10.64%]
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Patent:US2088568
03.08.1937 J. W. Beecher : Integrating Attachement for Telemetric Systems [7.44%]
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Patent:US2093254
14.09.1937 A. F. Spitzglass et al : Meter [5.99%]
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Patent:US2095215
05.10.1937 Hess Louis F : Psychrometric calculator [10.07%]
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Patent:US2096035
19.10.1937 O. T. Handwerk : Measuring Instrument [3.88%]
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Patent:US2103077
21.12.1937 W. L. Herron : Meter [4.01%]
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Patent:US2103332
28.12.1937 W. W. Mayfield : Pole and Guy Calculator [8.34%]
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Patent:US2107184
01.02.1938 W. W. Lasker : Bowden Wire [5.08%]
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Patent:US2117155
10.05.1938 C. Jan Dussel : Calculating Device [7.26%]
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Patent:US2118773
24.05.1938 Ball, Robert (P) : Calculator [8.54%]
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Patent:US2120878
14.06.1938 J. G. Valenzuela : Slide Rule [6.41%]
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Patent:US2121211
21.06.1938 P. Padva et al : Automatic Line Tracker [3.69%]
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Patent:US2127612
23.08.1938 L. F. Murguia : Record Calendar [3.73%]
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Patent:US2128834
30.08.1938 Mcgay John B Pittsburgh Equitable Meter Co : Chart calculating machine [3.63%]
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Patent:US2135783
08.11.1938 Carl Arnold : Mechanical toy imitating a calculating horse [5.56%]
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Patent:US2137630
22.11.1938 N. Sinitzin-White : Slide Rule [7.08%]
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Patent:US2138414
29.11.1938 J. Weckert : Ellipse or Circle Compass [3.94%]
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Patent:US2153089
04.04.1939 Kübler, Carl Addiator (P) : Means for Mounting an Adding and Subtracting Device on Slide Rules [5.96%]
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Patent:US2158553
16.05.1939 G. D. Rogers : Mechanical Calendar [3.99%]
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Patent:US2163032
20.06.1939 A. Goldstein : Calculating Device [7.67%]
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Patent:US2172004
05.09.1939 Anderson, Walter (P) Underwood (P) Elliott Fisher (P) Co : Supporting foot for adding machines [5.34%]
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Patent:US2173436
19.09.1939 O. T. Handwerk : Measuring Instrument [4.02%]
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Patent:US2173459
19.09.1939 P. M. Van Doormaal : Penetration Index Slide Rule [3.84%]
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Patent:US2177176
24.10.1939 H. Gilmore : Endless Slide Rule [11.20%]
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Patent:US2185202
02.01.1940 L. G. Kuhlmann : Calculating Device [3.82%]
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Patent:US2185677
02.01.1940 O. Nelson : Calculator [11.48%]
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Patent:US2187496
16.01.1940 W. Hess : Adding and Subtracting Device [10.19%]
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Patent:US2190071
13.02.1940 Keppers William M : Calculating protractor [11.01%]
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Patent:US2190281
13.02.1940 C. P. Berg : Slide Rule [3.86%]
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Patent:US2198708
30.04.1940 Arthur Thomas Powers Accounting Machines Ltd : Calculating Machine [5.49%]
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Patent:US2203194
04.06.1940 R. T. Frazier : Calculator [7.96%]
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Patent:US2207375
09.07.1940 P. A. Friedell : Photographic Measuring and Calculating Scale [10.99%]
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Patent:US2210388
06.08.1940 E. L. Vail : Speed and Distance Indicating Instrument [4.19%]
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Patent:US222126
02.12.1879 Briggs, William M. (P) : adding machine [12.11%]
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Patent:US2223612
03.12.1940 E. Grundlehner : Adding Machine [7.32%]
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Patent:US2230161
28.01.1941 Goudime-Levkovitsch, Paul (P) Simmonds Dev Corp Ltd : Calculating Apparatus [8.68%]
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Patent:US2233990
04.03.1941 W. W. Stanfield : Compass [4.06%]
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Patent:US2237873
08.04.1941 F. J. Barok : Calculating Device [3.90%]
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Patent:US2239959
29.04.1941 L. R. Gray : Course Converter for Conveyances [9.35%]
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Patent:US2240719
06.05.1941 E. G. Seastrom : Drawing Device [7.10%]
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Patent:US2244514
03.06.1941 J. Cwiekalo : Computing Device for Menstruation Cycles [13.04%]
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Patent:US2252749
19.08.1941 Backman Henry, Powers Luther : Calculating Device [6.55%]
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Patent:US2264370
02.12.1941 T. R. Harrison : Measuring Apparatus [3.65%]
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Patent:US2264406
02.12.1941 E. A. Ravenscroft : Reset Slide Rule [3.77%]
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Patent:US2264910
02.12.1941 W. H. Kliever : Integrator for Circular Ordinates [10.69%]
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Patent:US2268886
06.01.1942 Mcnamara Frank J : Calculating Device [6.45%]
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Patent:US2275219
03.03.1942 W. Daemen : Circular Slide Rule [17.44%]
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Patent:US2276153
10.03.1942 Burnham George, Burnham Robert : Calculating meter for road building [11.30%]
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Patent:US2284701
02.06.1942 Wardenburg, Frederic (P) Dodge Ralph L : Calculator [8.19%]
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Patent:US2284795
02.06.1942 N. Belaef : Control Mechanism [6.36%]