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Patent:US1220009


Patent:US 1220009
Title:Calculating machine
Date:20.03.1917
Place:Brunswick
Country:USA
Person:Schaller, Carl (P)
Company:Grimme, Natalis u. Co. (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1220009 (espacenet),  US1220009 (uspto)


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