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Patent:US1243669


Patent:US 1243669
Title:Combined type writing and computing machine
Date:16.10.1917
Place:New York
Country:USA
Person:Richard M. Becker
Company:Underwood (P) Computing Machine Comp.
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Keywords:
Link to the patent office:
(without guarantee)
 US1243669 (espacenet),  US1243669 (uspto)


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