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Die große Enzyklopädie des mechanischen Rechnens

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Search results for: ABACUS


  Country  Date  Score 
 
  • Patent:GB189403834 24.03.1894 Furrer, Alfred (P) : An improved money abacus [46.58%]
  • Patent:GB189811645 08.08.1889 Raphael Kabalkin : An Improved Abacus or Instrument for Rapid Calculation [47.57%]
  • Patent:GB189900692 18.02.1899 George Bower Froom : A New or Improved Abacus or Device for use in Calculating and for like Purposes [47.07%]
  • Patent:GB190325109 27.10.1904 Baines, Hewley Mortimer (P) : Improvements in Slide Rules and like Calculating Apparatus [50.26%]
  • Patent:GB190414716 04.05.1905 Wolodarsky, Hirsh (P) : An Improved Counting Frame or Apparatus [11.06%]
  • Patent:GB190425302 21.09.1905 James Thomas Reeve : An Improved Abacus or Apparatus chiefly designed for use in Teaching Arithmetic [45.64%]
  • Patent:GB191317890 05.08.1913 Montessori, Maria (P) : Abacuses [18.00%]
  • Patent:GB214142 17.04.1924 Lyadoff, Peter (P) : Improvements in or relating to calculating apparatus [12.37%]
  • Patent:GB2364412 23.01.2002 Stone Celia Anne : Abacus [47.14%]
  • Patent:GB343323 19.02.1931 Hugo Jung : Improvements in and relating to beads or counters for abacuses [12.02%]
  • Patent:GB359210 22.10.1931 Sarah Weaver Stephens : Improved apparatus for teaching calculations to children and for like [28.69%]
  • Patent:GB370060 07.04.1932 John James : Apparatus for teaching arithmetic [47.31%]
  • Patent:GB580444 09.09.1946 Samuel Lindon : An improved counting device [18.06%]
  • Patent:GB587220 17.04.1947 Lancelot Hogben : Apparatus for the use in the teaching of arithmetic operations [18.30%]
  • Patent:GB665938 06.09.1949 Debogorski, Julian (P) : Adding And Subtracting Instrument for British Montary and Weight Units [27.88%]
  • Patent:GB732266 22.06.1955 Kosma Pawlow : An improved abacus [49.12%]
  

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