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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB190919954


Patent:GB 190919954
Title:An Improvement in Calculating Machines
Date:16.12.1909
Place:
Country:Great Britain
Person:Jahnz, Erwin (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
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 GB190919954


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Aus der Patentschrift GB190919954