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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1638190


Patent:US 1638190
Title:Device for the mechanical multiplication of two factors
Date:09.08.1927
Place:
Country:USA
Person:Otto Eppenstein
Company:
Internal Links:Analogrechner
Keywords:
Link to the patent office:
(without guarantee)
 US1638190 (espacenet),  US1638190 (uspto)


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Aus der Patentschrift US1638190