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Patent:US1292537


Patent:US 1292537
Title:Calculating machine
Date:28.01.1919
Place:St. Louis
Country:USA
Person:Thieme, Otto (P)
Company:Moon-Hopkins (P) Billing Machine Co.
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1292537 (espacenet),  US1292537 (uspto)


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