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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US843944


Patent:US 843944
Title:Calculating Device
Date:12.02.1907
Place:
Country:USA
Person:R. L. Hibbard
Company:
Internal Links:Rechenscheibe
Keywords:
Link to the patent office:
(without guarantee)
 US843944 (espacenet),  US843944 (uspto)


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Aus der Patentschrift US843944