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Patent:US1634990


Patent:US 1634990
Title:Calculating Machine
Date:05.07.1927
Place:
Country:USA
Person:Friden, Carl Mauritz Fredrick (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1634990 (espacenet),  US1634990 (uspto)


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Aus der Patentschrift US1634990