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  • Patent:ES0332804 27.10.1966 Heyer, Arno (P) : UNA MAQUINA DE CALCULAR MECANICA EN MINIATURA. [25.50%]
 
  • Patent:FI26112 10.12.1952 Torell, Sture (P) AB Facit (P) : Anordning vid räknemaskiner och dylikt för utförande av automatisk division [25.24%]
  • Patent:FI558 16.03.1895 Hertzberg, Rafael (P) : Räkneur för utförandet av addition, subtraktion, multiplikation och division samt deras kombinationer [24.98%]
  
  • Patent:GB1003248 02.09.1965 IBM (P) : Improvements in or relating to digital adding circuitry [14.15%]
  • Patent:GB100402 03.08.1916 Arvin, Georg Julius (P) : Calculating Apparatus for use in Schools also Available for Ruling Lines [6.14%]
  • Patent:GB1007425 13.10.1965 Addmaster (P) Corp : Calculating machine [15.57%]
  • Patent:GB101013 18.01.1917 Soc. Chateau Freres (P) et Cie : Improvements in Calculating Machines [6.17%]
  • Patent:GB1029957 18.05.1966 Lloyd, John George (P) und Kitz, Norbert (P) und Drage, James John (P) Bell Punch (P) Co Ltd : Improvements in or relating to calculating machines [11.86%]
  • Patent:GB1029958 18.05.1966 Lloyd, John George (P) und Kitz, Norbert (P) und Drage, James John (P) Bell Punch (P) Co Ltd : Improvements in or relating to calculating machines [12.41%]
  • Patent:GB1042788 14.09.1966 Lloyd, John George (P) und Kitz, Norbert (P) und Drage, James John (P) Bell Punch (P) Co Ltd : Improvements in or relating to calculating machines [14.74%]
  • Patent:GB1042789 14.09.1966 Lloyd, John George (P) und Kitz, Norbert (P) und Drage, James John (P) Bell Punch (P) Co Ltd : Improvements in or relating to calculating machines [15.12%]
  • Patent:GB1048699 16.11.1966 Thevis, Paul (P) Olympia (P) Werke AG : Printing mechanism for calculating, accounting and like machines [14.76%]
  • Patent:GB1059791 22.02.1967 Rona Janos Snecma : Pneumatic or hydraulic adding circuit [15.30%]
  • Patent:GB1091168 15.11.1967 Monroe (P) International Corp. : Division control means [26.05%]
  • Patent:GB1105694 13.03.1968 Computron Corp : Calculating machine [16.75%]
  • Patent:GB1121511 31.07.1968 Texaco Development Corp : Analog calculator [15.09%]
  • Patent:GB112416 28.02.1918 Nicole Paul : Improvements in Calculating Apparatus [10.75%]
  • Patent:GB1131329 23.10.1968 Dorey, Frederick Charles (P) British Airports Authority : Calculator for use in computing charges made by time [5.49%]
  • Patent:GB113791 20.05.1920 Siemens (P) und Halske AG : Improvements in or relating to Means for Checking Workmens Time. [5.86%]
  • Patent:GB115029 11.04.1918 Blaustein, Joseph (P) : Improvements in Calculating Machines [3.11%]
  • Patent:GB117982 15.08.1918 Crawford, Edward Newton (P) : Improvements in and relating to Computing Yard Measures. [9.74%]
  • Patent:GB120985 02.12.1918 Allaun, Charles (P) : A Device or Calculator for Multiplying, Dividing, Adding and Subtracting Integers [20.89%]
  • 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 [10.31%]
  • Patent:GB129291 04.10.1920 Odhner, Valentin Jakob (P) : Improvements in or relating to Revolutions-counting Mechanism for Calculating Machines of the Pin-wheel and Cam-disk Type [6.20%]
  • Patent:GB131109 11.08.1919 Wade, Harold (P) : Improvements in or relating to Adding Machines [5.58%]
  • Patent:GB136093 11.12.1919 Watkins Alfred : Improvements in Graduated Scales and Index or other Sliding Reading [22.96%]
  • Patent:GB143884 28.05.1919 Trinks, Franz (P) : Multiplying and Dividing Apparatus [8.52%]
  • Patent:GB146792 10.04.1919 Mays, James Francis (P) : Improvements in calculating apparatus for performing the operation of division [27.38%]
  • Patent:GB147306 23.04.1919 Smith, A.E.; Bloodworth, F.J.; Adams, A. Smith & Co. E. : Tabular Calculators [13.59%]
  • Patent:GB147751 07.07.1915 Schaller, Carl (P) : Multiplying and Dividing Apparatus [14.12%]
  • Patent:GB147766 07.07.1921 Trinks, Franz (P) : Multiplying and Dividing Apparatus, Zeroizing Mechanism [14.85%]
  • Patent:GB149935 06.04.1920 Kemmerich, Otto (P) : Apparatus for assisting the addition of long columns of figures [13.90%]
  • Patent:GB155379 20.12.1920 John MacGillivray : Improvements in calculating instruments [5.93%]
  • Patent:GB166486 11.07.1921 Rauchwetter, Franz (P) : Division mechanism for calculating machines [26.05%]
  • Patent:GB167699 16.09.1920 Darnley, Percey Henry (P) and Richards, Barnett (P) : Teaching arithmetic.-A device for facilitating the learning of multiplication and division [25.19%]
  • Patent:GB174369 21.12.1922 Daemen, Victor (P) : Improvements in logarithmic computing apparatus [22.92%]
  • Patent:GB177796 07.06.1923 Antoine Isidore Odier : Improvements in and relating to calculating machines [11.63%]
  • Patent:GB187236 02.08.1923 Alphonse Hippolyte Claeys : Improvements in and relating to squares provided with scales for any kind of calculations [12.47%]
  • Patent:GB189503937 04.01.1896 Eagles, James (P) : An Improved Cylindrical Slide Rule [6.30%]
  • Patent:GB189510583 05.10.1895 Norris, Thaddeus (P) : Improvements in Slide Rules [9.55%]
  • Patent:GB189915527 02.06.1900 Goudie, William John (P) Goudie William John : Improvements in Calculating Rules and the like [6.32%]
  • Patent:GB190005142 22.12.1900 Dohm, Wilhelm (P) : An Improved Calculating Apparatus for Ascertaining the Section of Beams, Girders, Columns, and the like [15.76%]
  • Patent:GB190104011 23.11.1901 Pantsar Keicke : Improvements in Mechanical Adding and Calculating Apparatus [11.25%]
  • Patent:GB190112590 07.09.1901 Trinks, Franz (P) : Improvements in Calculating Machines [12.93%]
  • Patent:GB190218562 18.06.1903 Collins, Norman (P) : An Improved Calculator [6.48%]
  • Patent:GB190314330 19.11.1903 Müller, Arthur, Zeising, Otto (P) : Calculating Machine [16.02%]
  • Patent:GB190319870 18.08.1904 Kelling, Kurt (P) : Improvements in Repetition Means for Calculating Machines [16.41%]
  • Patent:GB190327472 17.11.1904 Cloud, Otho Edmund (P) : Improvements in Calculating and Registering Machines [14.72%]
  • Patent:GB190402172 03.03.1904 Vermehren, Johannes (P) : Improvements in Calculating Machines [8.43%]
  • Patent:GB190417291 15.06.1905 Troeger, Karl Emil (P) : Slide-rule [23.45%]
  • Patent:GB190502610 01.02.1906 Davis, Henry (P) und Smith, John William (P) : Wages and Premium Calculator [14.40%]
  • Patent:GB190623173 19.09.1907 Salcher, Alois (P) : Improvements in and relating to a Calculating Machine [14.81%]
  • Patent:GB190705779 10.10.1907 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : A New or Improved Calculating Machine [11.52%]
  • Patent:GB190706272 19.09.1907 Schmoelcke, Julius (P) : Improvements in and relating to Adding Devices [7.52%]
  • Patent:GB190723343 22.10.1908 Riedl, Camillo (P) : An Improved Calculating Machine [14.63%]
  • Patent:GB190727269 09.10.1908 Putnam, George Bowers (P) : Improvements in or relating to Adding Machines [15.43%]
  • Patent:GB190727358 10.12.1908 Prosser, Harry Reginald (P) : Improved Calculating Apparatus [5.70%]
  • Patent:GB190727446 06.08.1908 Bollinger, Alexander (P) und Landry, Alcide (P) und Landry, Eugen (P) : Improvements in or relating to Calculating Machines [17.12%]
  • Patent:GB190820467 27.05.1909 Giuliani, Vittore (P) : Improved Calculating Machine [15.25%]
  • Patent:GB190822435 18.02.1909 Trinks, Franz (P) : Improvements in Calculating Machines [15.62%]
  • Patent:GB190822620 03.06.1909 Leder, Ernst (P) : A Logarithmic Disc Calculating Machine [14.46%]
  • Patent:GB190908984 14.04.1910 Layton, Edwin James (P) : Improvements in or relating to Calculating Machines [10.10%]
  • Patent:GB190921023 03.03.1910 Jahnz, Erwin (P) : Improvements in and connected with Calculating Machines [16.34%]
  • Patent:GB190930600 23.06.1910 Bechtolsheim, Max (P) : An Improvement in Calculating Apparatus [7.68%]
  • Patent:GB191015101 27.04.1911 Cox, Edward Lomax (P) : A New and Improved Commercial Calculator [12.82%]
  • Patent:GB191022445 03.08.1911 Gray Henry : Apparatus for Facilitating the Multiplication and Division of Whole Numbers and Decimals. [24.76%]
  • Patent:GB191125313 14.11.1912 Pivoda, Franz (P) : Device for Calculating the Interest of a Principal [15.05%]
  • Patent:GB191210855 28.11.1912 Kerr David Smith : Improvements in Date Calculating Devices [10.52%]
  • Patent:GB191219506 20.02.1913 Matjeka, Otto Rudolf (P) : Improvements relating to Calculating Machines [6.35%]
  • Patent:GB191307731 27.11.1913 Trinks, Franz (P) : A Setting Mechanism for Calculating Machines [15.26%]
  • Patent:GB191310753 28.08.1913 Faber-Castell (P) : Improvements in and relating to Slide Rule Frames [7.12%]
  • Patent:GB191311575 19.05.1914 Breuer, Heinrich (P) : Calculating-apparatus [16.12%]
  • Patent:GB191317890 05.08.1913 Montessori, Maria (P) : Abacuses [9.76%]
  • Patent:GB191401326 29.07.1915 Rasmussen, Carl (P) : Improvements in and relating to Calculating Machines [14.23%]
  • Patent:GB191401782 10.06.1915 Pivoda, Franz (P) : Improvements in Calculating-apparatus for Determining Date Intervals [16.20%]
  • Patent:GB191404880 15.07.1915 Trinks, Franz (P) : Improvements in and relating to Calculating Machines [16.56%]
  • Patent:GB191504131 16.03.1916 Wade, Harold (P) : Improvements in or relating to Calculating Machines [14.47%]
  • Patent:GB191512793 07.09.1916 Harvey, Charles James (P) : Improvements in Devices for Calculating Percentages and the like [12.31%]
  • Patent:GB191513759 08.06.1916 Coddington, Fitzherbert John; Livens, George Henry : Improvements in Proportional Calculators [8.29%]
  • Patent:GB191516876 19.10.1916 Scurfield, George Gouthwaite : Improvements in and relating to Apparatus for or Means of Measuring the Depth of Colour of Various Substances whether Liquid or Solid. [5.54%]
  • Patent:GB195286 29.03.1923 Albert John Anido : Improvements in and connected with Slide Rules and the like [10.35%]
  • Patent:GB201168 17.07.1923 Kübler, Carl Addiator (P) : Improvements in Adding and Subtracting Appatus [3.61%]
  • Patent:GB2035640 18.06.1980 Craig, G (P) : Instructional device of the slide rule type [5.55%]
  • Patent:GB207694 06.12.1923 George Willis Grey : Improvements in or relating to calculating slide rules [7.70%]
  • Patent:GB211089 07.02.1924 Odhner, Valentin Jakob (P) : Improvements in transfer mechanisms for calculating machines [10.20%]
  • Patent:GB214142 17.04.1924 Lyadoff, Peter (P) : Improvements in or relating to calculating apparatus [3.96%]
  • Patent:GB2148564 30.05.1985 Duce Herbert John : Logarithmic calculating appliance [6.65%]
  • Patent:GB224549 07.04.1926 Bernhard Weiner : Improvements in and relating to calculating machines [5.98%]
  • Patent:GB240206 01.10.1925 Wilfred Ernest Jones : Improved calculating device for the use of printers [5.96%]
  • Patent:GB246134 15.01.1925 Bergmann, Jean (P) : Improvements in Calculating Devices. [19.75%]
  • Patent:GB248620 11.03.1926 Francesco Poggi und Umberto Emanuele : Improvements in or relating to calculating devices [6.25%]
  • Patent:GB253249 17.06.1926 Hugo John Buchanan Wollaston : Apparatus for calculating and scale drawing [14.46%]
  • Patent:GB257931 31.08.1926 Quijano, J. (P) : Multiplying and dividing apparatus [26.33%]
  • 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 [9.34%]
  • Patent:GB280204 09.02.1928 Paul Jellinek und Fritz Beer : An improved apparatus for calculating and measuring purposes [14.53%]
  • Patent:GB290181 01.11.1928 Jean Ansermot : Apparatus for measuring surfaces [6.40%]
  • 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 [5.88%]
  • Patent:GB303483 03.07.1930 Siemens (P) : Improvements in or relating to calculating machines [15.69%]
  • Patent:GB307254 07.03.1929 Frederick Arnold : Apparatus for measuring distances on charts [15.22%]
  • Patent:GB308768 22.05.1930 Marcel Jacob : Improvements in or relating to record controlled calculating machines [14.35%]
  • Patent:GB311414 03.04.1930 Denis Maurice Tissier : Calculators for use in betting [6.76%]
  • Patent:GB314609 04.07.1929 Michael Ewgenjewitchem Podtjag : Cylindrical slide rule [12.05%]
  • Patent:GB318150 26.06.1930 Fernand, Joseph Bourgeois (P) : Toy slide rule [18.23%]
  • Patent:GB328171 24.04.1930 Tauschek, Gustav (P) : Calculating machines [26.71%]
  • Patent:GB328455 01.05.1930 Harald, Odegaarden (P) : Improvements in or relating to calculating devices [6.67%]
  • Patent:GB337487 06.11.1930 Godfrey, Thomas Garwood (P) : An improved logarithmic calculator of the cylindrical type [18.75%]
  • Patent:GB343323 19.02.1931 Hugo Jung : Improvements in and relating to beads or counters for abacuses [6.51%]
  • Patent:GB358212 08.10.1931 Eric Cross : Improvements in or relating to calculating devices [5.76%]
  • Patent:GB363470 06.11.1929 Avery, Harold (P) Marchant (P) : Calculating Machines [24.76%]
  • Patent:GB364298 07.01.1932 Henry Osborne Brierly : Improvements in Slide Rules [9.52%]
  • Patent:GB381613 13.10.1932 David John Waghorn : Improvements in navigational plotting instruments [6.29%]
  • 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 [5.62%]
  • Patent:GB389524 20.03.1933 Rawlin Richard Maconchy Malloc : Improvements in and relating to calculating machines [15.82%]
  • Patent:GB431623 27.12.1934 Facit (P) : Improvements in Multiplying Machines [15.70%]
  • Patent:GB450599 18.12.1934 Marchant (P) : Calculating Machine [15.06%]
  • Patent:GB454249 28.09.1936 Campbell, Charles (P) British Tabulating (P) Mach Co Ltd : Improvements in or relating to calculating machines [14.54%]
  • Patent:GB458800 28.12.1936 British Tabulating (P) Mach Co Ltd : Improvements in or relating to calculating machines for performing division [24.85%]
  • Patent:GB458834 28.12.1936 British Tabulating (P) Mach Co Ltd : Improvements in or relating to record controlled calculating machines [15.14%]
  • Patent:GB460856 05.02.1937 Georges Baer : Improvements in calculating devices [13.92%]
  • Patent:GB469510 27.07.1937 Robert Miller, Cyril Beverley : Apparatus for scoring games [5.85%]
  • 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 [6.75%]
  • Patent:GB497039 12.12.1938 British Tabulating (P) Mach Co Ltd : Improvements in or relating to calculating machines for performing division [31.00%]
  • Patent:GB497676 23.12.1938 British Tabulating (P) Mach Co Ltd : Improvements in or relating to record-card controlled calculating machines [14.26%]
  • Patent:GB498999 17.01.1939 Tassilo Von Keler Praecisions Mechanische Und Op : Improvements in or relating to multiplying apparatus [14.06%]
  • Patent:GB500237 06.02.1939 Sidney Reginald Lucas : Improvements in or relating to slide rule calculators [9.70%]
  • Patent:GB525397 27.08.1940 Standard Telephones Cables Ltd : Improvements in or relating to electrically-operated calculating equipment [15.15%]
  • Patent:GB525398 27.08.1940 Standard Telephones Cables Ltd : Improvements in or relating to electrical calculating apparatus [15.33%]
  • Patent:GB532109 17.01.1941 British Tabulating (P) Mach Co Ltd : Improvements in or relating to calculating machines [26.25%]
  • Patent:GB551311 09.06.1941 Facit (P) : Calculating machines [15.35%]
  • Patent:GB567915 08.03.1945 John Donald MacLean : Improvements in Slide Rules and other calculators [6.04%]
  • Patent:GB571270 14.08.1945 Standard Telephones Cables Ltd : Electrical calculating apparatus [14.19%]
  • Patent:GB575100 30.11.1942 Facit (P) : Calculating machines [29.29%]
  • Patent:GB577195 08.05.1946 British Tabulating (P) Mach Co Ltd : Improvements in or relating to calculating machines [17.04%]
  • Patent:GB582052 30.05.1944 Facit (P) : Calculating - apparatus [15.08%]
  • Patent:GB585936 28.02.1947 Mahmoud El Shishini Marconi Wireless Telegraph Co, : An improved electrical device for effecting the multiplication or [14.47%]
  • Patent:GB586215 11.03.1947 Robert Lansdown, Edward John Walter : Improvements in or relating to Slide Rules [10.97%]
  • Patent:GB587220 17.04.1947 Lancelot Hogben : Apparatus for the use in the teaching of arithmetic operations [5.86%]
  • Patent:GB591680 26.08.1947 Baker, George Thomas (P) Automatic Telephone and Elect : Improvements in or relating to electrically operated calculating equipment [14.00%]
  • Patent:GB598407 18.02.1948 Lionel Skinner : A device for indicating the number of hours worked by a person [10.08%]
  • Patent:GB601375 23.07.1943 Felt und Tarrant (P) : Improvements in or Relating to Calculating Machines [29.94%]
  • Patent:GB632330 21.11.1949 Edward Ernest Keegan : A toy calculating device [10.45%]
  • Patent:GB662767 12.12.1951 British Tabulating (P) Mach Co Ltd : Improvements in and relating to calculating machines [13.92%]
  • Patent:GB667706 05.03.1952 : educational Device for teaching multiplication and division [18.00%]
  • Patent:GB669986 09.04.1952 British Tabulating (P) Mach Co Ltd : Improvements in and relating to calculating machines for performing division [30.83%]
  • Patent:GB693445 30.04.1951 Broido, Daniel (P) : Calculating Machines [14.85%]
  • Patent:GB698748 21.10.1953 Theodorus Reumerman und Willem Hendrik Theodorus Helmi : Improvements in or relating to checking devices for calculating apparatus [14.67%]
  • Patent:GB703178 27.01.1954 Emile Leon Gabriel Torcheux, Etienne Augustin Henri : Electric analogue calculator utilising quadripolar networks [14.08%]
  • Patent:GB712749 28.07.1954 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Improvements in or relating to calculating machines [5.50%]
  • Patent:GB716656 13.10.1954 Brunsviga (P) Maschinenwerke AG : Improvements in or relating to ten-key adding machines [15.13%]
  • Patent:GB717432 27.10.1954 Altenburger, Ernst (P), Hirt, Otto (P), Westinger, Karl (P) : Calculating machine for the four arithmetical operations (addition, subtraction, multiplication and division) [15.05%]
  • Patent:GB743826 25.01.1956 Kenneth Lowson : Improvements in or relating to slide rule cursors [25.06%]
  • Patent:GB749134 16.05.1956 Etablissements Japy Freres : Improvements relating to Adding Machines Adapted for Multiplication and Division [25.24%]
  • Patent:GB760883 07.11.1956 Atvidaberg Facit (P) Ab : Improvements in calculating machines [14.76%]
  • Patent:GB780431 31.07.1957 British Tabulating (P) Mach Co Ltd : Improvements in or relating to electronic calculating apparatus [14.52%]
  • Patent:GB781295 14.08.1957 IBM (P) : Improvements in calculating machines [14.41%]
  • Patent:GB787069 27.11.1957 Hall, George Virgil (P) Oliwa, Walter Stanley (P) Monroe (P) Calculating Machine Comp. : Improvements relating to sign detection mechanism for calculating machine registers [14.42%]
  • Patent:GB789854 29.01.1958 AB Åtvidaberg Facit (P) : Improvements in calculating machines with automatic division [23.70%]
  • Patent:GB819641 09.09.1959 Duke, Keith Albert (P) Int Computers and Tabulators Ltd : Improvements in or relating to calculating apparatus [15.19%]
  • Patent:GB819879 09.09.1959 AB Åtvidaberg Facit (P) : Improvements in calculating machines with automatic division [23.70%]
  • 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 [6.25%]
  • Patent:GB852182 26.10.1960 Gerhard Dirks : Cyclically operable electrical calculating apparatus [14.97%]
  • Patent:GB868759 25.05.1961 Kitz, Norbert (P) und Milburn, Robert (P) und Webb, Christopher Frederick (P) Bell Punch (P) Co Ltd : Improvements in or relating to calculating machines [26.01%]
  • Patent:GB881480 01.11.1961 Leslie Alfred Muirhead : Calculating apparatus to carry out arithmetical calculations [14.52%]
  • Patent:GB897786 30.05.1962 Inst za Ratsionalisatsia : Improved calculating instrument [17.64%]
  • Patent:GB912872 19.01.1961 Pickett and Eckel (P) : Improvements in Slide Rules [5.87%]
  • Patent:GB914330 02.01.1963 Philips Electrical Ind Ltd : Improvements in or relating to decimal-point indicators for calculating machines [14.86%]
  • Patent:GB925161 01.05.1963 Kitz, Norbert (P) Bell Punch (P) Co Ltd : Improvements in or relating to calculating machines [25.22%]
  • Patent:GB925163 01.05.1963 Kitz, Norbert (P) Bell Punch (P) Co Ltd : Improvements in or relating to calculating machines [6.99%]
  • Patent:GB929557 26.06.1963 Telefunken (P) Patent : A calculating system [14.85%]
  • Patent:GB935584 28.08.1963 Sidney Lidderdale Scarlett Armstrong Cork Company Ltd : Improvements in or relating to Slide Rules [10.56%]
  • Patent:GB942219 20.11.1963 Clark, Gordon Albert (P) Mullard Ltd : Improvements in or relating to digital electrical calculating apparatus [14.47%]
  • Patent:GB951789 11.03.1964 Reusch, Werner (P) und Voigt, Fritz (P) Elektronische Rechenmasch Ind : Hydraulic binary adder [15.21%]
  • Patent:GB957101 06.05.1964 Rca Corp : Binary half adder [14.59%]
  • Patent:GB958083 13.05.1964 Walther (P) Büromaschinen GmbH : Improvements in or relating to calculating machines [23.37%]
  • Patent:GB979150 01.01.1965 Clark, John Arnold (P) Addo Limited (P) : An improved calculator for teaching simple arithmetic [9.62%]
  • Patent:GB996747 30.06.1965 Sud Aviation : Electrical calculating apparatus for dividing or multiplying any number by a given factor [14.12%]
 
  • Patent:IT627054 12.04.1960 Lagomarsino (P) FAI (P) : Perfezionamenti ai dispositivi di divisione per macchine addizionatrici e calcolatrici scriventi [23.24%]
 
  • Patent:JP4923398 13.11.1970 Citizen (P) : SINGLE CONTROL DEVICE FOR STARTING THE MULTIPLICATION AND DIVISION OPERATIONS IN CALCULATING MACHINES [25.24%]
  • Patent:JP62085314 18.04.1987 Kawai Isato : Comma/Decimal Point Moving Device For Abacus [14.19%]
 
  • Patent:RU900 15.09.1924 Zernov, A. A. (P) (А. А. Зернов) : (Gerät zum Multiplizieren / Dividieren mehrstelliger Zahlen mit einstelligen Zahlen) [20.63%]
 
  • Patent:SE101482 21.12.1937 Carlström, Bengt AB Facit (P) : Anordning vid räknemaskiner av tiotangenttypen [3.12%]
  • Patent:SE102615 28.09.1939 Avery, Harold (P) Marchant (P) Calculating Machine Comp. : Motordriven räknemaskin med en anordning för utförande av automatiska divisionsoperationer [5.31%]
  • Patent:SE103341 31.07.1939 M. Hebel : Elektrisk räknemaskin [5.75%]
  • Patent:SE106758 17.06.1941 Carlström, Bengt, Grip, Erik Konrad (P) , Toorell, Sture (P) AB Facit (P) : Anordning vid Räknemaskiner för automatisk tabulering [7.85%]
  • Patent:SE107529 06.03.1942 Hamann, Christel (P) DeTeWe (P) Deutsche Telephonwerke und Kabelindustrie AG : Räknemaskin med en i förhållande till ett varvkopplingsverk rörlig vagn [4.97%]
  • Patent:SE109235 03.10.1942 Liljeström, Gustaf Vilhelm AB Original-Odhner (P) : Anordning vid räknemaskiner med tio räknetangenter [7.29%]
  • Patent:SE110456 18.02.1943 G. Schenk Brunsviga (P) Maschinenwerke Grimme, Natalis & Co. AG : Drivanordning for räknemaskiner och dylikt [3.12%]
  • Patent:SE111292 24.04.1942 Broido, Daniel (P) : Räknemaskin [3.15%]
  • Patent:SE112619 27.07.1942 S.I. Bratt : Mekanisk räkneapparat [3.17%]
  • Patent:SE113967 06.08.1941 H. Bellag Askania (P)-Werke AG : Elektriskt räkneinstrument för multiplikation och/eller division [8.29%]
  • Patent:SE117372 17.02.1943 R.S. Nilsson : Anordning vid räknemaskiner, vid vilka inställningshjul äro försedda med med tänder utrustade element, som genom påverkan av tangenter föras ut till verksamt läge [3.31%]
  • Patent:SE122909 30.12.1944 Lydfors, John (P) AB Dixma (P) : Tabuleringsanordning för ernående av ett variabelt utgångsläge vid divisionsförlopp vid räknemaskiner [3.20%]
  • Patent:SE123683 21.10.1939 L. Kozma, J. Kruithof Standard Electric A/S : Avståndskontrollerad elektrisk räkneapparatur med tryckverk vid kontrollapparaten för addition, subtraktion, multiplikation och division [5.45%]
  • Patent:SE124291 17.07.1945 Toorell, Sture (P) AB Facit (P) : Räknemaskin med logaritmiska, inställbara, avkännbara räknekroppar [3.07%]
  • Patent:SE126019 30.11.1942 Carlström, Bengt, Grip, Erik Konrad (P) AB Facit (P) : Låsanordning vid multiplikationsmaskiner [6.83%]
  • Patent:SE126263 30.11.1942 Grip, Erik Konrad (P) AB Facit (P) : Anordning vid räknemaskiner för automatisk tabulering [8.44%]
  • Patent:SE128435 19.05.1943 Grip, Erik Konrad (P), Toorell, Sture (P) AB Åtvidaberg Facit (P) : Anordning vid räknemaskiner [3.03%]
  • Patent:SE128438 08.05.1947 Toorell, Sture (P) AB Åtvidaberg Facit (P) : Anordning vid räknemaskiner och dylikt för utförande av automatisk division [8.15%]
  • Patent:SE12871 16.11.1900 Vermehren, Johannes (P) : Räknemaskin [4.18%]
  • Patent:SE12954 20.05.1899 H. Goldman : Räknemaskin [4.16%]
  • Patent:SE131110 20.08.1947 F.O.V. Larsen : Elektrisk räkneanordning [3.50%]
  • Patent:SE131350 25.04.1947 Grip, Erik Konrad (P), Toorell, Sture (P) AB Åtvidaberg Facit (P) : Tioöverföringsanordning vid räknemaskiner [8.16%]
  • Patent:SE133286 05.02.1946 Grip, Erik Konrad (P), Toorell, Sture (P) AB Åtvidaberg Facit (P) : Räknemaskin för automatisk multiplikation med ett inställningsverk för multiplikanden och ett för multiplikatorn [3.23%]
  • Patent:SE133366 06.02.1946 Grip, Erik Konrad (P), Toorell, Sture (P) AB Åtvidaberg Facit (P) : Anordning för utförande av automatisk multiplikation vid räknemaskiner och liknande maskiner [3.34%]
  • Patent:SE133644 18.04.1950 Crosman, Loring Pickering (P) Remington Rand (P) Inc. : Kopplingsanordning för elektroniska räkne- och talmagasineringsanordningar [3.30%]
  • Patent:SE136965 02.09.1947 Lydfors, John (P) AB Dixma (P) : För räknemaskiner o. dgl. avsedd inställningsanordning [3.07%]
  • Patent:SE142891 06.10.1949 Lydfors, John (P) AB Dixma (P) : Tabuleringsanordning vid multiplikationsmaskiner för ernående av ett visst antal i kvoten vid utförande av division [8.34%]
  • Patent:SE14935 11.05.1900 I. Hultman I. Hultman & A.M. Johanson : Räknemaskin [4.94%]
  • Patent:SE151366 12.10.1945 Chase, George Clinton (P) Monroe (P) Calculating Machine Co. : Motordriven räknemaskin [3.30%]
  • Patent:SE151886 27.09.1947 Mixer, Harold P. (P) Remington Rand (P) Inc : Räknemaskin [3.07%]
  • Patent:SE155169 17.10.1947 A.H. Dickinson, B.E. Phelps, C.A. Bergfors IBM (P) International Business Machines Corp. : Apparat för att i på varandra, följande räknesteg genom upprepad subtraktion av en divisor utföra en division från en dividend, jämte modifikation av denna apparat för utförande av multiplikation i stället för division [8.81%]
  • Patent:SE163385 23.05.1952 Wernecke, Otto (P) Brunsviga (P) Maschinenwerke AG : Tiotangent-additionsmaskin med ställstiftvagn och överföringsverk [9.79%]
  • Patent:SE165534 28.02.1955 Grip, Erik Konrad (P), L.G. Hellström AB Åtvidaberg Facit (P) : Anordning för att uträkna inverterade värden på Räknemaskiner med automatisk division [10.83%]
  • Patent:SE166831 26.11.1948 R.L. Riebow NCR (P) National Cash Register Co. : Indikeringsremsa för bestämning av decimalkommat vid additions- och subtraktionsmaskiner [9.62%]
  • Patent:SE174033 19.03.1955 Grip, Erik Konrad (P), L.G. Hellström, Toorell, Sture (P) AB Åtvidaberg Facit (P) : Anordning vid sådana räknemaskiner, äro försedda med automatiska divisionsanordningar [5.29%]
  • Patent:SE174627 20.03.1950 Capellaro, Natale (P) Ing. C. Olivetti (P) & C. S.p.A. : Motordriven tryckande räknemaskin [8.06%]
  • Patent:SE176159 09.05.1950 W.W. Landsiedel Remington (P) Rand Inc. : Tryckande räknemaskin [7.16%]
  • Patent:SE176936 05.05.1950 Landsiedel, W.W. Remington (P) Rand Inc. : Räknemaskin [5.56%]
  • Patent:SE18019 30.01.1904 Vermehren, Johannes (P) : Anordning vid räknemaskiner [8.57%]
  • Patent:SE18430 12.05.1903 Cl.G. Nilsson : Räknemaskin [5.36%]
  • Patent:SE187280 15.08.1963 Svoboda, Antonin (P) Aritma N.P. : Medelst hålkort styrd multiplicerande och dividerande räknemaskin [7.70%]
  • Patent:SE187407 28.07.1954 W. Hoppe EL-RE-MA SA per lo sfruttamento de brevetti : Elektrisk räknemaskin [7.07%]
  • Patent:SE190953 09.07.1958 Kuhn, Eugen (P) Olympia (P) Werke AG : Anordning för automatisk, förkortad multiplikation vid räknemaskiner [3.06%]
  • Patent:SE19331 08.06.1904 A.M. Johanson & I. Hultman : Anordningar vid räknemaskiner [3.94%]
  • Patent:SE196673 18.11.1959 E.M. Sterner : Räknesticka för multiplikation och/eller division av binära tal samt för omvandling av binära tal till decimala tal och vice versa [7.21%]
  • Patent:SE2018 15.08.1888 J. Jonzén : Anordning vid räkneapparater [8.41%]
  • Patent:SE215861 03.06.1960 H.W. Wagemann Monroe (P) Calculating Machine Comp. : Tryckande räknemaskin med decimalkommatyporgan [3.30%]
  • Patent:SE220824 05.09.1957 Kitz, Norbert (P), V.W. Sparrow, R. Milburn, C.F. Webb Bell Punch (P) Co. Ltd : Räknemaskin, särskilt en lätt bärbar bordsräknemaskin [5.51%]
  • Patent:SE28288 22.07.1909 Vermehren, Johannes (P) Aktieselskabet Vermehrens Regnemaskiner : Bråkäkningsmaskin [10.60%]
  • Patent:SE300895 15.10.1964 Kollmann, K.J.B.; Machmer, W.; Burkhardt, G.J. Diehl : For helautomatisk multiplikation och division avsedd hjälpstyranordning for räknemaskiner, särskilt motordrivna, med tryckverk försedda räknemaskiner för de fyra räknesätten [10.48%]
  • Patent:SE308412 01.08.1968 Eggebrecht, Rudolf (P), A. Metschnabel Firma Diehl (P) : Motordriven fyrspecies-räknemaskin med en fjaderdriven räkneverksvagn och en anordning för förhandsinställning av ett fixkomma [7.69%]
  • Patent:SE312694 17.04.1962 R. Walther, H. Langenberger, K. Röhrer Walther (P) Büromaschinen GmbH : Anordning vid räknemaskiner för att indikera och förhindra vilseledande kapacitetsöverskridning i kvotverket [5.18%]
  • Patent:SE320213 04.11.1965 Grip, Erik Konrad (P) AB Åtvidaberg Facit (P) : Räkneverk för räknemaskiner av tiotangenttyp [4.26%]
  • Patent:SE320214 01.07.1968 Metschnabel, Andreas  (P), W. Machmer Firma Diehl (P) : För helautomatisk och division avsedd hjälpstyranordning för räknemaskiner, i synnerhet motordrivna, skrivande räknemaskiner för de fyra räknesätten [9.03%]
  • Patent:SE333072 01.07.1968 T. Gassino Ing. C. Olivetti (P) & C. S.p.A. : Programstyranordning för en räknemaskin eller liknande maskin [4.77%]
  • Patent:SE38484 17.02.1914 Trinks, Franz (P) : Räknemaskin med ett inställningsverk och ett å en förskjutbar släde anordnat kvoträkneverk [4.95%]
  • Patent:SE39923 12.02.1912 Rauchwetter, Franz (P) : Räknemaskin [3.28%]
  • Patent:SE46269 27.05.1916 Schaller, Carl (P) Grimme, Natalis u. Co. (P) : Drivanordning för rotationsräkneverket vid räknemaskiner [6.33%]
  • Patent:SE46818 27.09.1912 Rechnitzer, Alexander (P) : Räknemaskin [3.20%]
  • Patent:SE47800 11.04.1917 W.O.J. Anderson AB Svenska Raeknemaskiner (P) : Stegförflyttningsanordning för räkneverkssläden vid räknemaskiner [3.55%]
  • Patent:SE47801 28.08.1917 G.W. Berglund : Räknemaskin [5.16%]
  • Patent:SE48897 08.06.1918 W.O.J. Andersson AB Original-Odhner (P) : Anordning vid räknemaskiner med inställbara tänder för att forsätta kvotregistret ur funktion [6.37%]
  • Patent:SE48947 28.08.1913 J.C. Enberg : Räknemaskin [3.05%]
  • Patent:SE49002 31.12.1919 Schubert, Emil (P) : Automatisk omställningsanordning för rotationsräkneverket vid räknemaskiner [15.15%]
  • Patent:SE49102 13.08.1917 H.O. Hægermark : Räknemaskin med i förskjutbara hållare styrda, nedtrycklbara tangenter [5.08%]
  • Patent:SE50763 28.06.1920 Rauchwetter, Franz (P) Optische Anstalt C.P. Goerz (P) AG : Anordning för automatisk division vid räknemaskiner med automatiskt reglerad divisions- och korrigeringskoppling [24.00%]
  • Patent:SE75533 19.07.1929 Tauschek, Gustav (P) Tabulating Machine Comp. : Elektrisk anordning för kontroll av maskindrivna räknemaskiner för automatisk division [24.48%]
  • Patent:SE89437 17.12.1934 Avery, Harold (P) Marchant (P) Calculating Machine Comp. : Räknemaskin av den roterande typen med anordningar för automtisk division [24.48%]
 

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