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Patent:US1309276


Patent:US 1309276
Title:Combined type-writer and calculating-machine
Date:08.07.1919
Place:Cleveland, Ohio, USA
Country:USA
Person:Dennis, A.S. (P)
Company:Marchant (P) Calculating Machine Comp.
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Link to the patent office:
(without guarantee)
 US1309276 (espacenet),  US1309276 (uspto)


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