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Patent:US1876294


Patent:US 1876294
Title:Calculating Machine
Date:06.09.1932
Place:
Country:USA
Person:R. Hofgaard
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1876294 (espacenet),  US1876294 (uspto)


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Aus der Patentschrift US1876294