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Die große Enzyklopädie des mechanischen Rechnens

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Search results for: Dreyfus, Armand Albert Abraham


 
  • Patent:CA116958 02.03.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Calculating machine
  • Patent:GB190705779 10.10.1907 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : A New or Improved Calculating Machine
  • Patent:GB190900621 18.03.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Improvements in Calculating Machines
  • Patent:US920840 04.05.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Calculating Machine
  • Patent:US932255 00.00.0000 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Calculating machine

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