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Patent:US946367


Patent:US 946367
Title:Calculating machine
Date:11.01.1910
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)
 US946367 (espacenet),  US946367 (uspto)


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