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Patent:US1503810


Patent:US 1503810
Title:Calculating Machine
Date:05.08.1924
Place:
Country:USA
Person:T. W. Ross
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1503810 (espacenet),  US1503810 (uspto)


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Aus der Patentschrift US1503810