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Suchergebnisse für: SLIDE RULE


  Land  Datum  Relevanz 
 
  • Patent:AU596312 26.04.1990 Muriel Astrid Reed Roger Glenn Reed : Slide calculator for background lighting [19.27%]
  • Patent:AU605071 03.01.1991 Muriel Astrid Reed Roger Glenn Reed : Slide calculator for photographic lighting [19.27%]
 
  • Patent:CA49990 14.09.1895 Thaddeus Norris : Slide Rule [50.73%]
  • Patent:CA992934 13.07.1976 Heinz Kunert : Nomogram type calculator slidable rule [27.91%]
      
  • Patent:EP0099826 01.02.1984 François Faurisson Eli Lilly France SA : Slide rule for medical prescriptions, especially for aminosides [46.63%]
 
  • Patent:FR1046852 15.07.1953 Abeille, Mario (P) Aquilecchia, Vincenzo (P) : Machine à calculer logarithmique micrométrique à projection lumineuse [43.82%]
  • Patent:FR2542114 07.09.1984 Galoche Gerard : Advertising support in the form of a Slide Rule [10.89%]
  • Patent:FR2585149 23.01.1987 Szlachetka Regis : Circular Slide Rule (information technology use) [10.91%]
  • Patent:FR2586837 06.03.1987 Darne Andre : Novel type of Slide Rule of the type comprising a case consisting of two adjoining walls leaving a gap in which at least one slide moves [11.56%]
  • Patent:FR2592711 10.07.1987 Figard Pierre Freix Sarl Ets : Slide Rule with double reading [10.32%]
  • Patent:FR2616249 09.12.1988 Bartier Jean-Claude Hoffmann La Roche : Slide Rule [9.89%]
  • Patent:FR2628865 22.09.1989 Maugein Jean Avenir Projets Innovation Cons : Slide Rule for computation of prodn. cost of item - uses four scales, of which two move, and pivoted nomogram cursor at end on one of movin [8.85%]
  • Patent:FR2754078 03.04.1998 Bach Julien : Slide Rule for calculating exposure for black and white photographic paper [9.70%]
  • Patent:FR2771832 04.06.1999 Le Noane Pierrick, Ropers Jean Yves, Ricard Jean Luc : Measurement and decimal conversion Slide Rule for teaching purposes [8.16%]
  • Patent:FR2776793 01.10.1999 Durif Jean Luc : Slide Rule for computation of tide levels [8.89%]
  • Patent:FR2802680 22.06.2001 Genevois Jean Michel Total Fina Sa : Slide Rule for calculating directional drilling of borehole has interchangeable stackable disks, further coaxially mounted partial disk(s) a [8.55%]
  • Patent:FR2823582 18.10.2002 Tollitte Francois Goerges : Device for reciprocal conversion between two currencies using a given factor, by use of a small card with a Slide Rule type scale and cursor [12.98%]
 
  • Patent:GB100175 15.02.1917 Arentz Charles Archer : Improvements in and relating to Departure Rules. [17.21%]
  • Patent:GB100568 01.06.1916 Haddan, Alfred John Henry (P) : Improvements in Multiple Totalizer Selecting Mechanism and Associated Column Printing Devices for Adding and Subtracting Machines [7.58%]
  • Patent:GB101013 18.01.1917 Soc. Chateau Freres (P) et Cie : Improvements in Calculating Machines [6.61%]
  • Patent:GB101051 10.08.1916 Wilfrid Henry Davis John Davis and Son Derby Ltd (P) : Improvements in the Construction of Slide Rules. [47.62%]
  • Patent:GB1024425 30.03.1966 Stanley, Horace Frederick Sarl (P) : Improvements in calculating devices [12.47%]
  • Patent:GB102734 11.12.1917 Elsner, O.; Ramuz, O. Effort S A L : Apparatus for Sorting and Counting Discs of Different Diameters [4.61%]
  • Patent:GB1035188 06.07.1966 Dennert, Georg (P) und Dennert, Hans (P) Dennert und Pape (P) : Stand for Slide Rule [49.71%]
  • Patent:GB1036408 20.07.1966 Vincent John Cochran Cooper : Improvements relating to slide calculating devices [27.08%]
  • Patent:GB1039127 17.08.1966 Müller, Friedrich Dennert und Pape (P) : Slide Rule Cursor [43.57%]
  • Patent:GB1045383 12.10.1966 Mannesmann (P) Meer AG : Improvements in or relating to calculating machines [27.69%]
  • Patent:GB1046023 19.10.1966 Chorton, John (P) : Slide rule [32.34%]
  • Patent:GB1050282 07.12.1966 AB Bofors (P) : Slide rule [41.66%]
  • Patent:GB1055297 18.01.1967 Olympia (P) Werke AG : Improvements in or relating to calculating and accounting machines [11.58%]
  • Patent:GB1055977 25.01.1967 Ricoh (P) Kk : A ten-key adding-listing machine [12.02%]
  • Patent:GB1058525 15.02.1967 Schenk, Gustav (P) Monroe (P) International Holland N : Ribbon feeding device for the printing mechanism of calculating machines and the like [26.69%]
  • Patent:GB1059791 22.02.1967 Rona Janos Snecma : Pneumatic or hydraulic adding circuit [12.45%]
  • Patent:GB1066065 19.04.1967 Sidney Lidderdale Scarlett-Smith : Improvements in or relating to slide rules [20.75%]
  • Patent:GB107228 18.06.1917 Berson, Theodore (P) Holophane Ltd : Improvements in and connected with Slide Rules and like Calculating Instruments [20.62%]
  • Patent:GB107562 05.07.1917 Hemmi, Jiro (P) : Improvements in the Slide Rules [36.96%]
  • Patent:GB108005 16.07.1917 Sharp, Henry Samuel : Improvements in and relating to screw thread calculators [11.46%]
  • Patent:GB108172 17.07.1917 Stokes, George Duncan Campbell (P) : A Field Gunnery Calculating Slide Rule for use with the 18 Pounder Q.F. Gun [39.21%]
  • Patent:GB108197 27.07.1917 Martin, Arthur John (P) : Improvements in Slide Rules for use in Wireless Telegraphy [40.20%]
  • Patent:GB1082528 06.09.1967 Olympia (P) Werke AG : A device for preventing the capacity of calculating machines from being exceeded [19.03%]
  • Patent:GB1082952 13.09.1967 Robinson, Anthony (P) Dowty Group Services : Slide rule [60.91%]
  • Patent:GB108460 03.01.1918 Boyelle-Morin, Georges (P) : Improvements in Testing or Determining the Hardness of Metals and other Substances [27.75%]
  • Patent:GB108512 07.08.1917 Richardson, James (P) : Improvements in and relating to the Determination of Volumes of Solid Bodies [11.36%]
  • Patent:GB108722 17.08.1917 Haddan, Alfred John Henry (P) NCR (P) : Improvements in Key Controlled Differential Actuating Mechanism forh Registers and like Machines [18.46%]
  • Patent:GB108731 21.08.1917 Haddan, Alfred John Henry (P) NCR (P) : Improvements in Cash Registers or similar Machines with Detachable Entry Retaining Devices [9.79%]
  • Patent:GB108800 17.08.1917 Haddan, Alfred John Henry (P) NCR (P) : Improvements in and relating to the Total and Sub-total Printing [17.99%]
  • Patent:GB109107 06.09.1917 Percy Bentley, Thomas Jackson Jackson Brothers Ltd : Improvements in Slide Rules. [49.52%]
  • Patent:GB109283 30.08.1917 Sinclair, Thomas Charles (P) : Improvements in or relating to Calculating Apparatus for use in Position Finding [12.48%]
  • Patent:GB109330 13.09.1917 Glaser William Henry : Improvements relating to Calculators. [13.58%]
  • Patent:GB1107651 27.03.1968 Rowe, William Brian (P) Wickman Scrivener Ltd : Calculating device for use with centreless grinding machines [56.18%]
  • Patent:GB110984 15.11.1917 Duckham Arthur McDougall : Improvements in Proportional Calculators. [21.84%]
  • Patent:GB1113256 08.05.1968 Retel, Rene (P) Rhone Poulenc Sa : Slide rule [42.95%]
  • Patent:GB1114917 22.05.1968 Blundell Rules Ltd : Improvements in or relating to Slide Rules [44.43%]
  • Patent:GB1114989 22.05.1968 : Improvements in or relating to an Ellipsograph [37.41%]
  • Patent:GB112145 28.12.1917 Flavell, Leo Edward (P) und Priest, Clarence Sidney (P) : Improvements in Totalizing Apparatus. [12.81%]
  • Patent:GB1121511 31.07.1968 Texaco Development Corp : Analog calculator [12.28%]
  • Patent:GB112455 13.06.1918 Printz, Oscar Adolf Kristian (P) : Improvement in Adding Machines [16.70%]
  • Patent:GB112530 17.01.1918 Crutchley Charles Frederick : A New or Improved Implement for Facilitating the Tuning of Pianos, [23.92%]
  • Patent:GB112577 17.01.1918 Boyd, Archibald Edward (P) : An Improved Automatic Counter. [12.40%]
  • Patent:GB112681 24.01.1918 Christie, Robert Arthur : Improvements in Slide Rules. [25.70%]
  • Patent:GB1128213 25.09.1968 Paul Milton Pepper : Improvements in or relating to calculating devices of the slide rule type [64.96%]
  • Patent:GB1130613 16.10.1968 Donald Wright : Improvements in calculating devices [24.03%]
  • Patent:GB114321 25.03.1918 Manson Jermiah Leask : Improvements in Calculating Rules [32.45%]
  • Patent:GB1147382 02.04.1969 Vorpahl, Carl Heinz (P) Bishman Mfg Company : Slide rule [28.40%]
  • Patent:GB115029 11.04.1918 Blaustein, Joseph (P) : Improvements in Calculating Machines [7.79%]
  • Patent:GB115207 13.12.1917 Buchanan, W. S. : Slide Rules for Determining the Output of Paper Making Machines [37.65%]
  • Patent:GB1156518 25.06.1969 Carl Rune Wern George Herman Wern Lars Ake Wern : slide rule [42.85%]
  • Patent:GB115981 30.05.1918 Wilfrid Henry Davis John Davis and Son Derby Ltd (P) : Improvements in Slide Rules. [53.22%]
  • Patent:GB1168995 29.10.1969 Heppenstall, Philip; Mear, Norman : Improvements in or relating to Circular Slide Rules [41.85%]
  • Patent:GB117318 18.07.1918 Chew, Albert Charles (P) : Slide Rule [59.94%]
  • Patent:GB1183705 11.03.1970 Boardman, Albert : A Punters Slide Rule [49.11%]
  • Patent:GB119113 26.09.1918 Brown, George Lawton (P) und Wheeler, Arthur Dickinson (P) : Improvements in or relating to Card-index and like Filing Appliances. [12.39%]
  • Patent:GB120696 21.11.1918 Ritter, Sophus Frederik (P) : Improvements in Cash Control or Checking Apparatus. [10.68%]
  • Patent:GB120980 29.11.1918 Eastwood, William (P) : Improvements in or appertaining to Watches, Aneroid Barometers and other dial instruments [27.16%]
  • Patent:GB120985 02.12.1918 Allaun, Charles (P) : A Device or Calculator for Multiplying, Dividing, Adding and Subtracting Integers [8.26%]
  • 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 [34.36%]
  • Patent:GB122230 09.01.1919 Morison, Donald Barns (P) : Improvements in Indicating and Recording Apparatus. [4.55%]
  • Patent:GB122435 20.01.1919 Squire, Cecil Edward (P) und Jowett Thompson : An Improved Calculating Machine [12.14%]
  • 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 [39.45%]
  • Patent:GB123241 20.02.1919 Guy, Frank Edward (P) : Improvements in and relating to Calculating Machines [13.48%]
  • Patent:GB123989 02.09.1920 Poor Charles Lane : Improvements in Calculating Instruments [11.87%]
  • Patent:GB124537 02.04.1919 Saxby, Herbert Baber (P) Shephard, Thomas Fredrick (P) : Improvements in or relating to Ball Releasing Apparatus applicable for Signalling or Registering Purposes [4.74%]
  • Patent:GB126453 08.05.1919 Scarlett, Frederick Ernest (P) Wilson, Edward Other (P) : Device for Obtaining the Diameters [11.12%]
  • Patent:GB127052 29.05.1919 Shove, Ralph Samuel (P) : New or Improved Method of and Means for Converting Normal to Gun Range or vice versa. [12.79%]
  • Patent:GB127280 05.06.1919 Routin, Joseph Louis (P) Maison Breguet (P) : Chronotelemetrical Apparatus for use in Regulating the Firing of Anti Aircraft Guns [4.32%]
  • Patent:GB1276784 07.06.1972 Dogigli, Johannes (P) ITAB Dogigli (P) KG : Slide Rule [44.71%]
  • Patent:GB128002 13.06.1919 Boggio Alfredo Santiago : Improvements in Apparatus for Calculating the Date of Expiry of a Given Period [10.51%]
  • Patent:GB128062 19.06.1919 Andersson, Wictor Oskar Julius (P) : Improvements in Calculating Machines of the Cam-disc and Pin-wheel Type [5.11%]
  • 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 [3.12%]
  • Patent:GB128563 22.04.1920 Svensson, Eric Elias (P) : Improvements in Detent Mechanism for Calculating Machines [5.14%]
  • Patent:GB128878 03.07.1919 Gallagher William, Crompton James : Apparatus for the Calculation of the Thermal Efficiency, and other [8.51%]
  • Patent:GB129533 17.07.1919 Jackson Thomas : Improvements in Slide Rules. [56.18%]
  • Patent:GB129600 17.07.1919 Jackson Thomas : Improvements in Slide Rules. [60.88%]
  • Patent:GB130206 31.07.1919 Claxton James Oscar : An Instrument for Making Calculations Involved in the Navigation of [12.39%]
  • Patent:GB131010 21.08.1919 Dehn, Frank Bernard (P) : Improvements in Printing-attachments for Adding Machines [4.59%]
  • Patent:GB131109 11.08.1919 Wade, Harold (P) : Improvements in or relating to Adding Machines [7.68%]
  • Patent:GB1311574 28.03.1973 Iosif Hondrea Iprofil Tehnolemn Industria Produselor Finite Din Lehm : Slide Rule Comprising a Stock, a Slide and a Cursor [59.14%]
  • Patent:GB1315623 02.05.1973 Horace Hawthorn British Thornton Ltd : Slide Rule Cursor [42.38%]
  • Patent:GB1316192 09.05.1973 Horace Hawthorn British Thornton Ltd : Double Sided Slide Rule Cursor [56.18%]
  • Patent:GB131823 30.01.1919 Bogaert, J. P. van : Differentiating Calculators [20.39%]
  • Patent:GB132018 31.08.1918 Aktiebolaget Svenska Räknemaskiner : Multiplying and Dividing Apparatus [24.00%]
  • Patent:GB1325479 01.08.1973 Progin, Bernard (P) : Calculating rule [28.52%]
  • Patent:GB1326655 15.08.1973 Int Communications Lab Inc : Rectilinear Slide Rule For Calculating Pi X And Pi X2 [73.92%]
  • Patent:GB132820 02.10.1919 Dehn, Frank Bernard (P) Automatic Bookkeeping Register Co. : Transfer or Carrying-over Mechanism for the Totalizing Counters of Adding and Registering Machines. [16.21%]
  • Patent:GB133577 30.01.1919 Windle, E : Plane Trigonometry Calculators, Slide Rules [21.20%]
  • Patent:GB133682 05.10.1918 Billeter, Max (P); Bohnhorst, O. : Logarithmic Calculators [12.10%]
  • Patent:GB134217 15.04.1920 Original Odhner (P) Ab : Improvements in or relating to the Carriage Mechanism of Calculating Machines of the Pin-wheel and Cam-disk Type [17.06%]
  • Patent:GB134221 20.05.1920 Odhner, Valentin Jakob (P) : Improvements in or relating to Zeroizing Mechanism for Calculating Machines [11.81%]
  • Patent:GB134833 05.11.1918 Fabriques des Montres Zenith : Slide Rule [32.96%]
  • Patent:GB135195 13.11.1918 Sauvageon, L. : plane trigonometry calculators [15.81%]
  • Patent:GB135671 21.12.1918 Martin, W. H. : Slide Rule [51.57%]
  • Patent:GB136043 11.12.1919 Walls Robert Reid : Improvements in or relating to Harmonographs. [4.63%]
  • Patent:GB136090 11.12.1919 Smith Edward William : Improvements in Slide Rules. [45.95%]
  • Patent:GB136093 11.12.1919 Watkins Alfred : Improvements in Graduated Scales and Index or other Sliding Reading [8.53%]
  • Patent:GB136179 08.01.1920 Appleyard, Rollo (P) : Apparatus for Calculating Differences in Height Above Sea-level from Barometer Readings [11.74%]
  • Patent:GB136180 08.01.1920 Appleyard, Rollo (P) : Range Calculator [12.59%]
  • Patent:GB138146 05.02.1920 Ommanney, Patrick Gream Nelson (P) : Instrument for facilitating calculations depending on the relations between the pressures, densities, temperatures and percentage compositions of gases, and the recording of observations of these quantities [15.81%]
  • Patent:GB1386730 12.03.1975 St, Josephs Hospital Medical Ce (P) : Slide Rule Guide To Intravenous Therapy [43.44%]
  • Patent:GB139340 04.03.1920 Albert Charles Chew : Improvements in or connected with Slide Rules [40.20%]
  • Patent:GB1402412 06.08.1975 Magyar Asvanyolaj Es Foeldgaz : Slide Rule For Use Inter Alia In The Interpretation Of Gas- Chromatograms [50.22%]
  • Patent:GB1423934 04.02.1976 Faber Castell (P) : Slide Rule With Computer [66.14%]
  • Patent:GB143559 23.12.1920 Trinks, Franz (P) : Improvements in or relating to calculating machines [27.27%]
  • Patent:GB143884 28.05.1919 Trinks, Franz (P) : Multiplying and Dividing Apparatus [16.53%]
  • Patent:GB143964 01.06.1920 Oswald, George Winzar (P) : Improvements in and relating to calculating devices of the slide rule type [35.82%]
  • Patent:GB144161 10.06.1920 Pollen, Arthur Hungerford (P) und Landstad, Halvor Folkestad (P) : Improvements in and relating to indicators for distance travelled foruse in aircraft [10.97%]
  • Patent:GB1450933 29.09.1976 Whitfield, L (P) : Slide Rule [40.54%]
  • Patent:GB1456688 24.11.1976 Grand, C : Slide Rule For Determining The Losses Of Head Along Pipes [55.55%]
  • Patent:GB146312 16.12.1920 Krupp (P) AG : Percussion fuse for projectiles [4.82%]
  • Patent:GB146613 12.07.1920 Toshiichi, Arimitsu (P) : Improvements in and relating to apparatus for use in solving nautical problems or plane and spherical trigonometry [22.66%]
  • Patent:GB146948 19.09.1921 Bloch, Georg (P) Bloch (P) : Improvements in calculating apparatus [24.72%]
  • Patent:GB1469755 06.04.1977 Blundell Harling Ltd : Slide RuleS [79.68%]
  • Patent:GB147477 08.12.1921 Reisser, Alexander (P) : Multiplying and Dividing Apparatus [12.36%]
  • Patent:GB148455 10.07.1920 Kübler, Carl, Carl : Calculating Apparatus [36.21%]
  • Patent:GB149158 12.08.1920 Keesey, Edward Walton (P) : Improvements in trigonometric calculators [19.54%]
  • Patent:GB149501 19.08.1920 Forbes, John Hynd (P) : Improvements in apparatus for registering and indicating distances [4.51%]
  • Patent:GB150103 02.09.1920 Leonard Charles Bygrave : A calculating instrument for aerial navigation purposes [11.90%]
  • Patent:GB150351 25.08.1921 Mang, Gerard (P) & Fournier, Louis (P) : Calculator [12.56%]
  • Patent:GB150813 06.09.1920 Stevens, William James (P) : Improvements in or relating to course and distance calculators and the like [12.96%]
  • Patent:GB150970 11.09.1920 Kuhrt, Ernst (P) : Multiplying and Typing Apparatus [12.68%]
  • Patent:GB151670 16.09.1920 Sidney Bernard Burns und Walter Francis Baker : Improvements in and relating to calculating apparatus for computing wages, percentages and the like [11.47%]
  • Patent:GB1517976 19.07.1978 Salvia Werk : Circular Slide Rule Suitable For Use In Determining The Electrolyte Deficiency In Infusion Therapy [41.86%]
  • Patent:GB152390 04.10.1920 Barker, John Paul (P) : Improvements in ticket punches. [28.21%]
  • Patent:GB152533 21.10.1920 Pickard, Ernest (P) Aktiebolaget Orginal-Ohdner (P) : Improvements in and applicable to cages for pit shafts and like [10.02%]
  • Patent:GB1530487 01.11.1978 Peters M : Plane Triangle Solver [10.13%]
  • Patent:GB154607 09.09.1918 Krems, O. : Multiplying and Dividing Apparatus [26.17%]
  • Patent:GB154608 18.10.1918 Krems, O. : Multiplying and Dividing Apparatus [14.90%]
  • Patent:GB154756 09.12.1920 John St Vincent Pletts : Improvements in Slide Rules [55.15%]
  • Patent:GB155344 08.12.1920 Charles Herbert Booth Halstead Best : Improved calculating device or slide rule [52.20%]
  • Patent:GB160186 24.03.1921 Francis James Anderson : Improvements in or relating to logarithmic computing apparatus [48.78%]
  • Patent:GB164442 01.06.1921 Edward Jones : Improvements in Slide Rules [51.13%]
  • Patent:GB167099 04.08.1921 August Straub, Andreas Hochstrasser : Improvements in or relating to sliding rules [44.52%]
  • Patent:GB167801 23.08.1921 George Thomas Buckham, Arthur Trevor Dawson : Improvements in or relating to instruments for use in the laying of ordnance [11.96%]
  • Patent:GB169178 09.01.1922 Reisser, Alexander (P) : Improvements in the transfer mechanism of calculating machines [11.53%]
  • Patent:GB172640 11.01.1923 Optische Anstalt C. P. Goerz (P) : Improvements in and relating to electromotive drives for calculating machines [12.47%]
  • Patent:GB174369 21.12.1922 Daemen, Victor (P) : Improvements in logarithmic computing apparatus [24.28%]
  • Patent:GB175064 10.02.1922 William James Smith Bliss Co : Improvements in Slide Rules [37.81%]
  • Patent:GB177411 30.03.1922 William Thomas Palmer : An improved calulator [4.64%]
  • Patent:GB178273 20.04.1922 Robert Stanley Capon : Improvements in apparatus for calculating the ground speed of aircraft [33.30%]
  • Patent:GB179933 14.09.1922 Augustin, Wilhelm (P) Bing (P) Werke : Improvement in or connecting with calculating machines [19.62%]
  • Patent:GB180695 27.08.1923 Leon Appoullot : Improvements in or relating to calculating apparatus [28.82%]
  • Patent:GB183723 03.01.1922 King, Otis (P) : Improvements in and relating to Calculating Apparatus [35.99%]
  • Patent:GB185075 28.08.1922 NCR (P) : Improvements in totalizing-counter selecting and actuating mechanism for calculating machines [21.62%]
  • Patent:GB187236 02.08.1923 Alphonse Hippolyte Claeys : Improvements in and relating to squares provided with scales for any kind of calculations [13.74%]
  • Patent:GB187604310 07.11.1876 Boucher, Alexandre Emile Marie (P) : Improved instrument to be used as a substitute for the ordinary slide rule [46.63%]
  • Patent:GB187801044 26.03.1878 Fuller, George (P) : Spiral slide rule for working arithmetical calculations [48.08%]
  • Patent:GB187803059 08.08.1887 Frederick A. Sheppard? : slide rule [50.73%]
  • Patent:GB188100863 01.03.1881 Fearnley, J. B. (P) : Calculating apparatus [48.59%]
  • Patent:GB188402149 01.01.1885 Lala Ganga Ram : slide rule [50.73%]
  • Patent:GB188810311 01.01.1888 Mudd : Improvements in slide rules or calculating instruments [21.42%]
  • Patent:GB188908285 01.01.1889 Cuttriss : Improvements in slide rules or calculating devices [18.05%]
  • Patent:GB189117794 01.01.1891 S. Milne : slide rule [51.29%]
  • Patent:GB189402496 05.05.1894 Heinel Gustav, Barth Carl : Ellipsograph. [12.50%]
  • Patent:GB189409900 18.05.1895 Watson, Thomas Henry (P) : An Improved Double Slide Rule for Calculating Displacement, Register Tonnage, Indicated Horse Power, and Speed of Ships [43.92%]
  • Patent:GB189502166 31.01.1895 Charles Newton Pickworth : Improvements in Slide Rules [21.20%]
  • Patent:GB189503937 04.01.1896 Eagles, James (P) : An Improved Cylindrical Slide Rule [24.82%]
  • Patent:GB189510583 05.10.1895 Norris, Thaddeus (P) : Improvements in Slide Rules [24.66%]
  • Patent:GB189518 29.11.1922 Gaston, Beauvais (P) : Improvements in or relating to logarithmic calculating devices [35.89%]
  • Patent:GB189603281 02.07.1889 Robert Belshaw : An Improvement in Slide Rules [21.42%]
  • Patent:GB189614623 15.05.1897 Sheridan, Matthew Joseph (P) : A New and Improved Slide Rule for Reducing Spirits [36.53%]
  • 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 [22.09%]
  • Patent:GB189904489 01.03.1899 Fossa-Mancini, Carlo (P) : An Improved Adding Apparatus [11.58%]
  • Patent:GB189915527 02.06.1900 Goudie, William John (P) Goudie William John : Improvements in Calculating Rules and the like [16.15%]
  • Patent:GB189919288 21.07.1900 Farmar, Francis Charles (P) : An Improved Slide-rule for Computing and Calculating Purposes [34.25%]
  • Patent:GB190005142 22.12.1900 Dohm, Wilhelm (P) : An Improved Calculating Apparatus for Ascertaining the Section of Beams, Girders, Columns, and the like [25.60%]
  • Patent:GB190007579 23.05.1901 Cruickshank, James (P) und Smith, Rudolph Charles  (P) : Improvements in Calculating Scales or Slid Rules [47.30%]
  • Patent:GB190013316 27.10.1900 Rinsche, Frank Charles (P) : Improvements in Calculating Machines [20.24%]
  • Patent:GB190023627 27.12.1900 Jennings, Richard Lanyon (P) : A circular, pocket, slide-rule for use in the timber trades [47.59%]
  • Patent:GB190108309 23.04.1902 Farmar, Francis Charles (P) : A Slide-rule for all Calculating purposes in connection with Wines and Spirits [25.02%]
  • Patent:GB190123236 02.10.1902 John Perry : Improvements in slide rules [21.42%]
  • 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 [50.42%]
  • Patent:GB190202104 28.08.1902 Börner, Franz : Improvements in or connected with Mechanical Calculating Tables or ”Ready Reckoners.” [21.02%]
  • Patent:GB190203991 08.05.1902 Smith, Horace Andrew (P) : Improvements in Adding Devices [15.82%]
  • Patent:GB190207571 05.06.1902 Krause, Rudolf (P) : Improved Calculating Scale or Slide [24.11%]
  • Patent:GB190213957 16.10.1902 Masera, Silvio (P) : An Improved Slide-rule [27.83%]
  • Patent:GB190215775 08.01.1903 Goldberg, Hyman Eli (P) : Improvements in Calculating Machines [14.07%]
  • Patent:GB190215776 08.01.1903 Goldberg, Hyman Eli (P) : Improvements in Calculating Machines [4.94%]
  • Patent:GB190227822 05.02.1903 Watkins, Alfred (P) : Improvements in Instruments for Calculating Photographic Exposures [12.04%]
  • Patent:GB190309095 04.02.1904 Anderson, Francis James (P) : Improvements relating to Mathematical Calculating Devices [49.36%]
  • Patent:GB190310230 17.03.1904 Alexander von Faber-Castell : Improvements in slide rules [20.97%]
  • Patent:GB190319870 18.08.1904 Kelling, Kurt (P) : Improvements in Repetition Means for Calculating Machines [13.35%]
  • Patent:GB190322762 18.02.1904 Anderson, Francis James (P) : Improvements relating to Mechanical Calculating Devices [45.44%]
  • Patent:GB190325109 27.10.1904 Baines, Hewley Mortimer (P) : Improvements in Slide Rules and like Calculating Apparatus [30.32%]
  • Patent:GB190327364 28.01.1904 Tate, Samuel (P) : Improvements in and relating to Calculating Machines or Arithmometers [13.40%]
  • Patent:GB190401787 31.03.1904 Macmaster, Peter (P) : An Improved Elapsed Time Calculator [19.63%]
  • Patent:GB190404010 30.06.1904 Moehlenbruck, Henri (P) : Improvements in Calculating Apparatus [13.78%]
  • Patent:GB190411300 07.07.1904 Pallweber, Josef (P) : An Improved Adding Machine [15.95%]
  • Patent:GB190417291 15.06.1905 Troeger, Karl Emil (P) : Slide-rule [35.67%]
  • Patent:GB190417499 22.09.1904 Smith, Rudolph Charles (P) : Improvements in Slide Rules [21.20%]
  • Patent:GB190422359 17.11.1904 Sperry, Elmer Ambrose (P) : Improvements in Calculating Machines [34.85%]
  • 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 [37.14%]
  • Patent:GB190610459 21.02.1907 Evans-Cross, George William (P) : Improvements in Calculating Appliances more particularly in and relative to Tabular Apparatus and used in conjunction with Slide-rules, Cu [20.09%]
  • Patent:GB190612959 14.02.1907 Haydock, Richard (P), Lewis, Robert David (P) : Novel or Improved Device for use in Extending a Length of Piping Downwards, such as Adding a Length of Air Pipe during Sinking Operations i [11.83%]
  • Patent:GB190623173 19.09.1907 Salcher, Alois (P) : Improvements in and relating to a Calculating Machine [12.05%]
  • Patent:GB190703685 12.12.1907 Pugh, John Vernon (P) : Improvements in and relating to Calculating and the like Devices [25.61%]
  • Patent:GB190706272 19.09.1907 Schmoelcke, Julius (P) : Improvements in and relating to Adding Devices [15.96%]
  • Patent:GB190711999 23.01.1908 Trinks, Franz (P) : Improvements in Calculating Machines [12.19%]
  • Patent:GB190714250 30.04.1908 Eckelmann, Max (P) : Improvements in Adding-up Machines [25.86%]
  • Patent:GB190715261 19.03.1908 Bäuerle, Tobias : Improvements in Calculating Machines [12.32%]
  • Patent:GB190718218 12.12.1907 Yokota, Seinen (P) : Improved Slide Rule [51.58%]
  • Patent:GB190723343 22.10.1908 Riedl, Camillo (P) : An Improved Calculating Machine [20.16%]
  • Patent:GB190726170 21.05.1908 Bürk, Richard : An Improved Selective Manual Operating Mechanism for Calculating Machines [13.06%]
  • Patent:GB190727358 10.12.1908 Prosser, Harry Reginald (P) : Improved Calculating Apparatus [26.70%]
  • Patent:GB190807364 27.08.1908 Francis Charles Farmar : Improvements in or connected with Slide Rules [20.75%]
  • Patent:GB190807421 14.01.1909 Fellows, Hugh William (P) : A New or Improved Gear Calculating Instrument [12.41%]
  • Patent:GB190808820 12.11.1908 Quentell, William Prehn (P) : Improvements in Calculating Machines [7.67%]
  • Patent:GB190808893 18.03.1909 Leontine Payen - Huard : Improvements relating to Arithmometers and the like [12.16%]
  • Patent:GB190814721 19.08.1909 Hall, Charles Gilbert (P) : A Printing and Adding Cash Till [25.58%]
  • Patent:GB190815964 26.08.1909 Daemen-Schmid, Heinrich (P) : An Improved Calculating Machine [20.22%]
  • Patent:GB190822435 18.02.1909 Trinks, Franz (P) : Improvements in Calculating Machines [12.71%]
  • Patent:GB190903073 02.12.1909 Burt, Edward Alexander Philips (P) : Improvements in Measuring and Calculating Rules [20.86%]
  • Patent:GB190906064 29.07.1909 Edge Douglas Ross und Hunter John Chalmers : Improvements in Weight Calculating Slide Rules [39.60%]
  • Patent:GB190906657 31.12.1909 Salcher, Alois (P), Werle, Nicolaus (P) : An Improved Calculating Apparatus [12.12%]
  • Patent:GB190907731 09.09.1909 Smith, Rudolph Charles (P) : Improvements in Calculating Scales [65.47%]
  • Patent:GB190911029 09.12.1909 Oelschläger, Wilhelm : Improvements in Circular Slide Rules [21.20%]
  • Patent:GB190912032 23.05.1910 Layton, Edwin James (P) : Improvements in or relating to Calculating Machines [12.42%]
  • Patent:GB190912516 27.05.1910 Burt, Edward Alexander Philips (P) : An Improved Measuring and Calculating Rule [25.33%]
  • Patent:GB190916900 23.12.1909 Hill, Ebenezer (P) : Improvements in Instruments for Calculating the Correction to be Applied to a Vessel’s Course to Counteract Tidal Effect [11.84%]
  • Patent:GB190917041 07.04.1910 Soncini, Gino (P) : Improved Means for Effecting Multiplication [16.62%]
  • Patent:GB190919954 16.12.1909 Jahnz, Erwin (P) : An Improvement in Calculating Machines [13.79%]
  • Patent:GB190930600 23.06.1910 Bechtolsheim, Max (P) : An Improvement in Calculating Apparatus [6.25%]
  • Patent:GB191004991 17.11.1910 Gooch Claiborne Watts : Improvements in or relating to Adding and Listing Machines [12.00%]
  • Patent:GB191005528 23.06.1910 Fowler, William Henry (P) : An Improved Calculator [11.68%]
  • Patent:GB191010482 15.12.1910 Howard Vernon Percy Weston : Improvements in and relating to the graduation of logarithmic slide rules [20.33%]
  • Patent:GB191012935 22.12.1910 Hemm Hermann Carl Carsten Von : Improvements in or relating to Logarithmic Calculating Apparatus [23.71%]
  • Patent:GB191013852 15.12.1910 Stelfox, Sydney Herbert : Improvements in the Construction of Slide-rules [20.97%]
  • Patent:GB191015101 27.04.1911 Cox, Edward Lomax (P) : A New and Improved Commercial Calculator [8.11%]
  • Patent:GB191017958 02.03.1911 Rauchwetter, Franz (P) : A Calculating Machine, especially intended for Effecting Multiplication [12.66%]
  • Patent:GB191019211 16.08.1911 Harris, Arthur William (P) : Improvements relating to Calculating Machines [12.11%]
  • Patent:GB191020636 08.06.1911 Quentell, William Prehn (P) : Improvements in Adding Machines [12.05%]
  • Patent:GB191020681 17.08.1911 Wolter, Carl (P) : Improvements in Reversible Transfer Mechanism for Calculating Machines [12.31%]
  • Patent:GB191027151 28.09.1911 Cloud, Otho Edmund (P) : Improvements in Calculating Machines [12.26%]
  • Patent:GB191103281 02.11.1911 Underwood, John Thomas (P) Underwood (P) Computing Machine Company : Improvements in and relating to Combined Adding and Typewriting Machines [11.66%]
  • Patent:GB191108709 21.09.1911 Behr, Bernhard (P) : Improvements relating to Calculating Machines [18.72%]
  • Patent:GB191109755 22.04.1912 Burnett, Arthur John Herbert (P) : Improvements in and relating to Adding Machines, Cash Registers and similar Mechanisms [11.10%]
  • Patent:GB191115972 14.12.1911 Behr, Bernhard (P) vormals Seidel und Naumann (P) AG : Figure Rules for Calculating Machines [38.96%]
  • Patent:GB191118809 27.06.1912 A.B. Dick Company : Improvements in Key Board and Printing Mechanisms for Calculating Machines [22.60%]
  • Patent:GB191120596 05.09.1912 Bordt, Adolf (P) : Improvements in Printing Mechanism for Adding Machines [12.54%]
  • Patent:GB191125313 14.11.1912 Pivoda, Franz (P) : Device for Calculating the Interest of a Principal [12.25%]
  • Patent:GB191128132 16.12.1912 Kopp, Albert (P) : An Improved Tachymetric Calculator [17.61%]
  • Patent:GB191128360 27.06.1912 Cole, Harold Linter (P) : An Improved Slide-rule for Calculating the Tractive Effort of Steam Locomotives [46.07%]
  • Patent:GB191128365 29.08.1912 Schaller, Carl (P), Trinks, Franz (P) : Improvements in Calculating Machines [11.92%]
  • Patent:GB191201533 20.01.1913 Harry Robert Gall Inglis : Improvements in and connected with slide rules [20.75%]
  • Patent:GB191204178 21.08.1912 A.B. Dick Company : Improvements in Calculating Machines [13.07%]
  • Patent:GB191209704 17.04.1913 Jeffree, Frank Henry (P) : Improvements in or relating to Tabular-calculating Apparatus [12.42%]
  • Patent:GB191210855 28.11.1912 Kerr David Smith : Improvements in Date Calculating Devices [22.61%]
  • Patent:GB191211076 11.08.1913 Bannehr, Leonard William (P) und Watson, George (P) Dolton : Improvements in Adding and Subtracting Machines [11.34%]
  • Patent:GB191211598 07.11.1912 Buchert, Adolf (P) : Improvements in Calculating Apparatus for Teaching Arithmetic [6.60%]
  • Patent:GB191212717 29.05.1913 Farmar, Frank Charles : Improvements in or relating to Slide Rules [20.75%]
  • Patent:GB191214574 05.12.1912 Rauchwetter, Franz (P) : Totalizing Mechanism for Calculating Machines and the like [26.12%]
  • Patent:GB191214777 07.11.1912 Boult, Alfred Julius (P) Burroughs (P) : Improvements in or relating to Adding or like Machines [11.70%]
  • Patent:GB191214853 14.11.1912 Avery, Charles Henry (P) : Calculating Apparatus [13.03%]
  • Patent:GB191225466 06.11.1913 Weale, James Anthony (P), Jones, Edward (P) : A Slide Rule for Calculations in Measuring and Pricing Timber [45.94%]
  • Patent:GB191228850 15.12.1913 vormals Seidel und Naumann (P) AG : Improvements in Calculating Machines [35.47%]
  • Patent:GB191300311 13.11.1913 Layton, Edwin James (P) : Improvements in or connected with Calculating Machines [19.52%]
  • Patent:GB191301671 04.09.1913 Augustin Wilhelm : Improvements in Calculating Machines [21.24%]
  • Patent:GB191309502 22.05.1914 Sloan, Roland Hoyt (P) : Improvements in or relating to Calculating Machines [18.66%]
  • Patent:GB191310753 28.08.1913 Faber-Castell (P) : Improvements in and relating to Slide Rule Frames [35.12%]
  • Patent:GB191315821 02.04.1914 Childs, Charles Vivian (P) : A Slide-rule for Structural Engineers [21.41%]
  • Patent:GB191320424 10.09.1914 Auguste Esnouf : slide rules for the Computation of Safe Loads on, and of Crippling Stresses and Factors of Safety for, Struts, Columns, Stanchions, and the like. [19.16%]
  • Patent:GB191322165 12.02.1914 Agnew Richard Fletcher : Slide Rule [28.65%]
  • Patent:GB191323575 24.06.1915 Bunzel Delton (P) Werk : Improvements in Calculating Machines [15.19%]
  • Patent:GB191325947 09.04.1914 Gregor Rudolf Ferdinand Heinrich Cuntz Schacht und Westerich : Improvements relating to Slide Rules [20.12%]
  • Patent:GB191326896 07.01.1915 Powers, James (P) : Tabulator printers [12.01%]
  • Patent:GB191401325 14.05.1914 Grimme Natalis (P) : Improvements in and relating to Calculating Machines and the like [11.47%]
  • Patent:GB191411030 05.05.1915 Lee, John (P), Bottomley, Frederick Joseph (P) : A New or Improved Calculating Apparatus [46.37%]
  • Patent:GB191413073 27.05.1915 Cashmore, Montague (P) : Improvements in or relating to Proportion Calculators [4.87%]
  • Patent:GB191421924 03.11.1915 Robertson, Thomas : Improvements in and relating to Slide Rules [21.20%]
  • Patent:GB191423620 25.11.1915 Burt, Edward Alexander Philips (P) : An Improved Measuring and Calculating Rule [39.29%]
  • Patent:GB191423968 17.06.1915 Lilly Walter Elsworthy : Improvements in and relating to Logarithmic Calculating Apparatus [43.40%]
  • Patent:GB191424239 17.12.1915 Gray, John (P) : An Improved Slide Rule [41.50%]
  • Patent:GB191502643 17.02.1916 Ernest Montague Bates, Frederick Phillips NCR (P) : Improvements in Apparatus having a Number of Divisions or Equivalents, such as Cash Registers or Calculating Machines with Totalizers, Filing Cabinets, Voting Machines and the like [8.03%]
  • Patent:GB191502668 21.02.1916 Mather, John Cecil (P) : Proportional Calculator [22.31%]
  • Patent:GB191502857 11.11.1915 Milton Olin Spicknall : Improvements in and relating to slide rules [20.97%]
  • Patent:GB191505158 08.05.1916 Mather, John Cecil (P) : Improvements in Calculating Apparatus [25.37%]
  • Patent:GB191505203 06.04.1916 Mohn, Rudolf (P) : Improvements in and relating to Calculating Machines [4.83%]
  • Patent:GB191508034 15.07.1915 Ketley Charles Bosworth : Improvements in Machines for Calculating and Recording Data Borne by Shaped Record Cards [12.83%]
  • Patent:GB191508613 03.02.1916 Addometer Corporation (P) : Improvements in and relating to Calculating Machines [12.33%]
  • Patent:GB191512966 17.08.1916 Brown, William Fearon (P) : An Improved Slide Rule [49.47%]
  • Patent:GB191517440 02.03.1916 Milton Olin Spicknall : Improvements in and relating to slide rules [20.97%]
  • Patent:GB191645 18.01.1923 : Improved Ellipsograph [12.44%]
  • Patent:GB1919134833 29.04.1920 Fabrique des Montres Zénith : Improvements in circular slide rules [20.75%]
  • Patent:GB194418 14.03.1923 Fairburn, Charles Edward (P) und Harper, Frederic Arthur (P) English Electric Co Ltd : Improvements relating to Slide Rules [25.31%]
  • Patent:GB195286 29.03.1923 Albert John Anido : Improvements in and connected with Slide Rules and the like [25.03%]
  • Patent:GB196589 16.08.1923 A W Faber Castell (P) Bleistift Fa : Improvements in Slide Rules [33.56%]
  • Patent:GB2009641 20.06.1979 Lohf & Tillipaul : Apparatus for Truing Grinding Wheels with an Involute Profile [29.70%]
  • Patent:GB201168 17.07.1923 Kübler, Carl Addiator (P) : Improvements in Adding and Subtracting Appatus [12.26%]
  • Patent:GB201653 07.08.1923 Richard Stuart Bicknell : Improvements in or relating to calculating devices [29.58%]
  • Patent:GB2035640 18.06.1980 Craig, G (P) : Instructional device of the slide rule type [27.37%]
  • Patent:GB203862 20.09.1923 Sydney Herbert Groom Sheringham Daylight Ltd : Apparatus for use in calculating the winnings of wagers [37.57%]
  • Patent:GB207694 06.12.1923 George Willis Grey : Improvements in or relating to calculating slide rules [30.84%]
  • Patent:GB207762 04.12.1923 King, Otis (P) : Improvements in or relating to calculating apparatus [13.45%]
  • Patent:GB207856 04.12.1923 King, Otis (P) : Improvements in or relating to calculating apparatus [12.38%]
  • Patent:GB2080589 03.02.1982 Burnett, William British Aerospace : Mechanical calculator [21.69%]
  • Patent:GB210162 28.01.1924 Harry Price Tullis John Tullis and Son Ltd : An improved calculator for power transmission belting [39.39%]
  • Patent:GB210265 31.01.1924 Shirley Brooks Ralston : Slide-rule or computing apparatus for calculating ship stability [17.15%]
  • Patent:GB2110848 22.06.1983 Riehle, Harald (P) : Slide Rule [21.43%]
  • Patent:GB211623 28.02.1924 Anders Josef Ostlind, Karl Gustav Hagstrom : Improvements in devices for determining stop or diaphragm opening and or the focus, minimum distance and maximum distance of range in photographic cameras [11.86%]
  • Patent:GB211669 28.02.1924 Arthur Forshaw : Improvements in calculating devices for solving equations between a number of variables such as calculating the consumption of gas [12.18%]
  • Patent:GB213238 14.08.1924 Frappant Ag Fuer Praez S Und F : Improvements in Slide Rules or the like calculators [35.63%]
  • Patent:GB214604 30.10.1924 J B Soellner Nachf Reisszeugfa : Improvements in Slide Rules [55.58%]
  • Patent:GB2148564 30.05.1985 Duce Herbert John : Logarithmic calculating appliance [5.41%]
  • Patent:GB214919 01.05.1924 Reginald Sidney Carr und William Ronald Fountaine Sange : An improved apparatus for calculating percentages [4.63%]
  • Patent:GB2155672 25.09.1985 Zhang Tianze Tsinlien Trading Co Ltd : Slide rule [36.16%]
  • Patent:GB215648 15.05.1924 Harold Fowler, William Henry Fowler : Improvements in circular calculators [11.95%]
  • Patent:GB2157465 23.10.1985 Schwenzer Manfred, Zimmermann Eugen Harald, Fuhrmann Upat Max Langensiepen Kg : Apparatus for the determination of permissible loads upon dowels [18.74%]
  • Patent:GB216365 29.05.1924 Brandstetter, Georg (P) Geobra (P) : Improvements in Slide Rules [51.48%]
  • Patent:GB2167015 21.05.1986 Smith Colin George : Proportional rule device for defining an area on a plane surface [31.99%]
  • Patent:GB2175543 03.12.1986 Swift Raymond Basil : Board aid to positive guided drawing and sketching in perspective [28.68%]
  • Patent:GB218712 15.07.1924 Harry Skeet Broom Broom and Wade Ltd : Improvements in and relating to calculators [11.77%]
  • Patent:GB218961 09.07.1924 Perpete, Georges Victor Lambert (P), Puttemans, Hubert Auguste (P) : Improvements in adding and printing machines [12.05%]
  • Patent:GB220758 28.08.1924 Charles Felicien Blacher Guy S Calculating Machines : Improvements in calculating machines [32.73%]
  • Patent:GB223086 16.10.1924 Jacob Simpson : Improvements in calculating apparatus for determining ranges and bearings [11.92%]
  • Patent:GB2254953 21.10.1992 Mckenna, Josephine (P) und McKenna, James (P) : Musical Transposition Slide Rule [49.32%]
  • Patent:GB2262182 09.06.1993 Forster, Brenda Coralie (P) : Harmony slide rule [62.31%]
  • Patent:GB227643 22.01.1925 George Gouthwaite Scurfield : Improvements in and relating to Slide Rules or other logarithmically [33.60%]
  • Patent:GB2278482 30.11.1994 Cox Philip : Mathematical learning aid [39.00%]
  • Patent:GB2292220 14.02.1996 Yeo Dennis George : Levelling aid [28.45%]
  • Patent:GB232037 16.04.1925 Lindsay Ernest Edwards : Improvements in and relating to calculating instruments [35.30%]
  • Patent:GB232150 16.04.1925 Fuss, Herbert (P) : Improvements in or relating to logarithmic calculating apparatus [13.07%]
  • Patent:GB2321985 12.08.1998 Hadjigeorgiou, Agamemnon Charal (P) : Slide rule [17.36%]
  • Patent:GB232442 23.04.1925 Rudolf Uhlich : Improvements in Slide Rules [48.88%]
  • Patent:GB233183 07.05.1925 Gebr. Wichmann (P) M B H : Improvements in slide rules and like calculating apparatus [38.19%]
  • Patent:GB235949 25.06.1925 Gordon, Harry Francis Adam (P) : Improved calculating apparatus for solving navigational problems involving drift, wind, and ground speed [25.71%]
  • Patent:GB240206 01.10.1925 Wilfred Ernest Jones : Improved calculating device for the use of printers [6.39%]
  • Patent:GB241908 17.06.1926 : [29.55%]
  • Patent:GB242394 12.11.1925 Neville, Eric Harold : Improved apparatus for performing calculations relating to proportion [4.78%]
  • Patent:GB248620 11.03.1926 Francesco Poggi und Umberto Emanuele : Improvements in or relating to calculating devices [15.30%]
  • Patent:GB253758 24.06.1926 Addison, Herbert (P), William Blaine Luard : An apparatus for the mechanical solution of certain trigonometrical problems [8.20%]
  • Patent:GB254153 01.07.1926 Philip Ray Coursey : Improvements relating to logarithmic calculating-apparatus [26.17%]
  • Patent:GB254589 05.07.1926 Willem Frederik Grotendorst : Improvements in or relating to tabular calculating apparatus particularly for use inthe laying of ordnance [16.68%]
  • Patent:GB259112 07.10.1926 Schauer, Joachim (P) : Improvements in or relating to logarithmic calculating apparatus combined with writing implements [11.69%]
  • Patent:GB268243 31.03.1927 Frederick Henry Haynes : Calculator for readily determining the relationship between wavelength, inductance and capacity in electrical circuits [33.79%]
  • Patent:GB276094 25.08.1927 Thomas, Clifford Woodman (P) : A new or improved device for calculating weights and quantities in the manufacture of textile fabrics [10.40%]
  • Patent:GB279996 29.09.1926 Millward, David Henry (P) : A proportional ruler for measuring distances in given proportion to each other from a fixed point [26.05%]
  • Patent:GB280177 26.04.1928 Alexander Von Castell Ruedingh : Improvements in Slide Rules [49.05%]
  • Patent:GB283003 05.01.1928 Thomas Davidson Cosans Eyre And Spottiswoode Bible Wa : New or improved protector for the cursors of Slide Rules [39.33%]
  • Patent:GB284445 02.02.1928 Black, John (P) : Slide rule for paper makers [49.57%]
  • Patent:GB290181 01.11.1928 Jean Ansermot : Apparatus for measuring surfaces [5.21%]
  • Patent:GB290746 21.05.1928 Ruben Brusch : Calculating cylindrical slide rules with slider [21.04%]
  • Patent:GB290897 24.05.1928 Karl Albin Abraham Johansson : Improvements in and relating to means for mounting type-writers, calculating machines, and other office machines on tables or desks [4.92%]
  • Patent:GB291324 31.05.1928 : Improved Ellipsograph [12.63%]
  • Patent:GB292333 21.06.1928 Lewis, William Blomfield (P) : Improvements in or relating to calculating devices for facilitating the setting out or centering of type-written or similar matter [10.05%]
  • Patent:GB296379 21.02.1929 Bergmann, Jean (P) : Improvements in calculating machines [4.93%]
  • Patent:GB302209 12.12.1928 Charles Henry Preston : Improvements in rules, measuring gauges and the like [30.15%]
  • Patent:GB307513 12.12.1929 Askania (P) Werke Ag : Improvements in or relating to calculating devices [23.04%]
  • Patent:GB311414 03.04.1930 Denis Maurice Tissier : Calculators for use in betting [12.75%]
  • Patent:GB314609 04.07.1929 Michael Ewgenjewitchem Podtjag : Cylindrical slide rule [33.35%]
  • Patent:GB318024 29.08.1929 : Ellipsograph [6.60%]
  • Patent:GB318150 26.06.1930 Fernand, Joseph Bourgeois (P) : Toy slide rule [53.14%]
  • Patent:GB322943 19.12.1929 Lawrence, John De Whalley (P) : A slide rule or calculator for use in sugar boiling [35.09%]
  • Patent:GB325357 20.02.1930 Ruxton Multi Vider Corp : Improvements in or relating to combined calculating and writing instruments [27.23%]
  • Patent:GB326860 24.03.1930 Blezzard, Fred (P) Chas Macintosh and Company Ltd : A new or improved calculating device [11.87%]
  • Patent:GB329231 15.05.1930 Arthur Storey : Improvements relating to Slide Rules [68.12%]
  • Patent:GB332373 24.07.1930 Jeffery Walton Barnes : Improvements in or relating to calculating apparatus [12.74%]
  • Patent:GB335379 25.09.1930 Neil Lawson Lewis and Tylor Ltd : A slide rule for calculating data connected with belting [44.89%]
  • Patent:GB337487 06.11.1930 Godfrey, Thomas Garwood (P) : An improved logarithmic calculator of the cylindrical type [18.37%]
  • Patent:GB339016 04.12.1930 Krupp (P) AG : Improvements in zero printing arrangements for calculating machines, cash registers and similar machines [12.03%]
  • Patent:GB339984 16.12.1930 Arthur Thomas Kyberd : Improvements in or relating to clips for attaching pocket+rules and [35.73%]
  • Patent:GB346447 13.04.1931 Emil Hubert : Improvements in or relating to typing, adding, and like machines [7.66%]
  • Patent:GB352470 30.06.1931 Zeiss, Carl (P) : Improvements in calculating apparatus for transforming co-ordinates [12.75%]
  • Patent:GB353877 28.07.1931 Ellis (P) Adding Typewriter Compan : Improvements in or relating to calculating machines, adding and listing machines, accounting machines and similar machines [11.53%]
  • Patent:GB356434 10.09.1931 Sydney Herbert Stelfox : Improvement in the construction of slide+rules [64.13%]
  • Patent:GB360854 11.11.1931 William Muncaster Lovatt : Wind allowance calculator for use in shooting [17.97%]
  • Patent:GB364298 07.01.1932 Henry Osborne Brierly : Improvements in Slide Rules [22.14%]
  • Patent:GB367993 03.03.1932 Seehase, Hans (P) : Improvements in Slide Rules [58.47%]
  • Patent:GB368991 17.03.1932 Kay Ivar Andersen : Improvements in calculating devices [12.58%]
  • Patent:GB373023 19.05.1932 Braun, Ernst (P) : Improvements in calculating devices [20.56%]
  • Patent:GB373362 26.05.1932 Lauri, Pihkala (P) : A support for holding typewriters, calculating machines or the like in the lap [8.39%]
  • Patent:GB380326 15.09.1932 Optische Anstalt C. P. Goerz (P) : Improvements in navigational calculating apparatus [43.92%]
  • Patent:GB381395 06.10.1932 Faber Castell (P) : A slide rule for electrical engineers [52.44%]
  • Patent:GB381613 13.10.1932 David John Waghorn : Improvements in navigational plotting instruments [11.85%]
  • Patent:GB390136 30.03.1933 : Double geared Ellipsograph [17.17%]
  • Patent:GB391617 04.05.1933 Jordan, Socrates Askitopoulos (P) : Combined slide rule and surveying instrument [72.53%]
  • Patent:GB395992 27.07.1933 Faber Castell (P) : Improvements in and relating to a slide rule [54.57%]
  • Patent:GB396533 10.08.1933 Neil Lawson Lewis and Tylor Ltd : A slide rule connecting data relating to the discharge of water from nozzles [42.06%]
  • Patent:GB406488 01.03.1934 Henryk Sonabend : Improvements in and relating to maps [8.40%]
  • Patent:GB411090 29.05.1934 Boardman, Hubert (P) A.G. Thornton (P) : Improvements in Slide Rule Calculators [66.98%]
  • Patent:GB412312 28.06.1934 Otto Brachvogel : Improvements in combined tape measures and Slide Rules [27.04%]
  • Patent:GB413112 12.07.1934 William Herbert Giles Alexander Thornton Ltd. Ag : Magnifying contrivances for the cursors of Slide Rules [41.41%]
  • Patent:GB413308 09.07.1934 Algernon William Dargue, Frederick Lewin Dargue : Improvements in or relating to longitudinal slide+rules [33.03%]
  • Patent:GB413451 19.07.1934 Vivian Charles Eric Marten Gwi : Improvements relating to Slide Rules [34.87%]
  • Patent:GB414995 16.08.1934 Ernst Schumacher : Improvements in computing apparatus for transforming coordinates [11.86%]
  • Patent:GB417841 12.10.1934 Wellington, Barrett (P) : Calculating device [24.74%]
  • Patent:GB424863 01.03.1935 A W Faber Castell (P) : Improvements in or relating to cursors for Slide Rules [32.51%]
  • Patent:GB433976 23.08.1935 Fritz Alois Hug und Victor Adolf Hug : Improvements in or relating to calculating apparatus for trigonometric calculations [12.35%]
  • Patent:GB439419 05.12.1935 Jacques Rudd : Improvements in manually-operated contract bridge scorers [7.99%]
  • Patent:GB440406 23.12.1935 Alexandru Prager : Apparatus for calculating bonuses and penalties in the game of bridge [11.74%]
  • Patent:GB442998 19.02.1936 Evert Zuidema : Improvements in or relating to game-scorers and declaration indicators [12.25%]
  • Patent:GB443689 04.03.1936 Dussel, Cornelis Jan (P) & Pasveer, Jan (P) : Circular Slide Rule [43.31%]
  • Patent:GB447001 11.05.1936 William Dubilier : Improvements in or relating to slide rules and like calculating apparatus [36.07%]
  • Patent:GB455053 13.10.1936 James William Mander : Improvements in or relating to Slide Rules [61.06%]
  • Patent:GB457085 20.11.1936 Faber Castell (P) : Improvements in or connected with slide-rule cursors [40.34%]
  • Patent:GB464234 14.04.1937 Friedrich Simon : Improvements in or relating to calculating devices [11.44%]
  • Patent:GB468257 01.07.1937 Boardman, Hubert (P) & Clayton, Albert Edmund (P) & Naylor, Felix Samuel (P) Thornton (P) Ltd : Improvements in Slide Rule calculators, other scale devices, and direction drawing instruments [25.46%]
  • Patent:GB468323 02.07.1937 A W Faber Castell (P) : Improvements in and relating to Slide Rules [60.44%]
  • Patent:GB468996 16.07.1937 Marttiterae O, Y Physica A B : A correction calculating ruler for the calculation of flying path deviations [48.32%]
  • Patent:GB469838 04.08.1937 John Dunbar Blyth : A height computing slide rule [39.97%]
  • Patent:GB474334 29.10.1937 Kübler, Carl : Improvements in or connected with Slide Rules [69.87%]
  • Patent:GB474335 29.10.1937 John Leroy Glover, Nicholas Nicholas Solovioff, : Improvements in navigation instruments [12.09%]
  • Patent:GB484852 11.05.1938 Walter Henry Edridge : Improvements in and relating to combined logarithmic calculating and linear measurement scales or scales having equi-distant graduations [5.49%]
  • Patent:GB488290 05.07.1938 Andre Rochat : Calculating apparatus [11.36%]
  • Patent:GB489501 28.07.1938 Charles Andrew Fountaine : Improvements in or relating to calculating slide rules [61.42%]
  • Patent:GB489603 28.07.1938 Charles Andrew Fountaine : Improvements in or relating to calculating slide rules [50.67%]
  • Patent:GB491381 29.08.1938 Sidney Wheatley : Improvements in or relating to means for controlling the printing mechanism of calculating or statistical machines [11.33%]

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