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Patent:US1224314


Patent:US 1224314
Title:Combined type writing and computing machine
Date:01.05.1917
Place:Hartford, CT und New York
Country:USA
Person:Osmond W. Olmsted
Company:Underwood (P) Computing Machine Comp.
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Link to the patent office:
(without guarantee)
 US1224314 (espacenet),  US1224314 (uspto)


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