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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US957062


Patent:US 957062
Title:Calculating machine
Date:03.05.1910
Place:Berlin und Braunschweig
Country:USA
Person:Jahnz, Erwin (P)
Company:Grimme, Natalis u. Co. (P)
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Link to the patent office:
(without guarantee)
 US957062 (espacenet),  US957062 (uspto)


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