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Patent:US1589347


Patent:US 1589347
Title:Calculating Machine
Date:22.06.1926
Place:
Country:USA
Person:F. W. Barkley
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1589347 (espacenet),  US1589347 (uspto)


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Aus der Patentschrift US1589347