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Patent:US1449639


Patent:US 1449639
Title:Calculating Machine
Date:27.03.1923
Place:
Country:USA
Person:Turck, Joseph Abraham Valentine (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1449639 (espacenet),  US1449639 (uspto)


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Aus der Patentschrift US1449639