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Patent:US1252738


Patent:US 1252738
Title:Calculating-machine
Date:08.01.1918
Place:Des Moines
Country:USA
Person:Martin Teetor
Company:Teetor Comp.
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1252738 (espacenet),  US1252738 (uspto)


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