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Patent:US707309


Patent:US 707309
Title:Adding-machine
Date:19.08.1902
Place:St. Louis
Country:USA
Person:Ellis, Halcolm (P), Perkins, Nathan W. (P)
Company:Charles H. Filley
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Keywords:
Link to the patent office:
(without guarantee)
 US707309 (espacenet),  US707309 (uspto)


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