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Patent:US1291859


Patent:US 1291859
Title:Combined type-writing-and computing machine
Date:21.01.1919
Place:Hartford, CT und New York
Country:USA
Person:Hanson, Hans (P)
Company:Underwood (P) Computing Machine Comp.
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Keywords:
Link to the patent office:
(without guarantee)
 US1291859 (espacenet),  US1291859 (uspto)


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