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Patent:US1957496


Patent:US 1957496
Title:Calculating machine
Date:08.05.1934
Place:Piedmont 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)
 US1957496 (espacenet),  US1957496 (uspto)


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