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Patent:US1865751


Patent:US 1865751
Title:Calculating machine
Date:05.07.1932
Place:Oakland, CA und Emeryville, CA
Country:USA
Person:Friden, Carl Mauritz Fredrick (P)
Company:Marchant (P) Calculating Machine Comp.
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Link to the patent office:
(without guarantee)
 US1865751 (espacenet),  US1865751 (uspto)


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