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Patent:US1306112


Patent:US 1306112
Title:Adding machine
Date:10.06.1919
Place:Chicago
Country:USA
Person:Johantgen, Oliver David (P)
Company:Victor (P) Adding Machine Co.
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Keywords:
Link to the patent office:
(without guarantee)
 US1306112 (espacenet),  US1306112 (uspto)


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