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Patent:US1517413


Patent:US 1517413
Title:Transfer mechanism in adding machines
Date:02.12.1924
Place:Grand Rapids, MI
Country:USA
Person:Doerr, Fred H.
Company:Todd Protectograph Comp., Inc.
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Keywords:
Link to the patent office:
(without guarantee)
 US1517413 (espacenet),  US1517413 (uspto)


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