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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB191219274


Patent:GB 191219274
Title:Improvements in Calculating Machines
Date:03.04.1913
Place:
Country:Great Britain
Person:Greve, John E. (P)
Company:Wanderer (P) Werke
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Link to the patent office:
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 GB191219274


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Aus der Patentschrift GB191219274