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Patent:US1382286


Patent:US 1382286
Title:Combined typewriting and computing machine
Date:21.06.1921
Place:Newark, NJ und New York
Country:USA
Person:Hart, Frederick (P)
Company:Underwood (P) Computing Machine Comp.
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Keywords:
Link to the patent office:
(without guarantee)
 US1382286 (espacenet),  US1382286 (uspto)


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