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Die große Enzyklopädie des mechanischen Rechnens

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Search results for: Gorin, Frederick Proctor


 
  • Patent:DE194969 16.02.1907 Gorin, Frederick Proctor (P) : Rechenmaschine zum Addieren und Subtrahieren
  • Patent:GB190703764 14.11.1907 Gorin, Frederick Proctor (P) : Calculating Machine

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