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Die große Enzyklopädie des mechanischen Rechnens

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Search results for: Bell, Robert Arthur


 
  • Patent:CA140530 21.05.1912 Barr, Mark (P); Bell, Robert Arthur (P); Beeton, Henry Ramie (P) : Calculating machine
  • Patent:CH58239 17.03.1913 Barr, Mark (P); Bell, Robert Arthur (P); Beeton, Henry Ramie (P) : Rechenmaschine
  • Patent:DE320761 25.10.1911 Barr, Mark (P); Bell, Robert Arthur (P) ; Beeton, Henry Ramie (P) : Rechenmaschine, insbesondere zum Multiplizieren
  • Patent:GB191505674 17.07.1916 Bramston, Maurice Alfred (P) und Barr, Mark (P) und Bell, Robert Arthur (P) : An Improved Adding and Subtracting Machine
  • Patent:US1272889 16.07.1918 Barr, Mark (P); Bell, Robert Arthur (P); Beeton, Henry Ramie (P) : Calculating machine

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