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Patent:US1560381


Patent:US 1560381
Title:Calculating Machine
Date:03.11.1925
Place:
Country:USA
Person:A. L. Gray
Company:Todd Company (P) Inc.
Internal Links:Todd Visible
Keywords:
Link to the patent office:
(without guarantee)
 US1560381 (espacenet),  US1560381 (uspto)


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Aus der Patentschrift US1560381