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Patent:US1644897


Patent:US 1644897
Title:Calculating machine
Date:11.10.1927
Place:Webster Groves, MO und St. Louis, MO
Country:USA
Person:Edward C. Schinke
Company:Accountograph Comp.
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Keywords:
Link to the patent office:
(without guarantee)
 US1644897 (espacenet),  US1644897 (uspto)


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