Suchergebnisse für: Dreyfus, Armand Albert Abraham

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Patent:CA116958
02.03.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Calculating machine
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Patent:GB190705779
10.10.1907 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : A New or Improved Calculating Machine
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Patent:GB190900621
18.03.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Improvements in Calculating Machines
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Patent:US920840
04.05.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Calculating Machine
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Patent:US932255
24.08.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Calculating machine