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Patent:US1254627


Patent:US 1254627
Title:Combined type writing-and computing machine
Date:22.01.1918
Place:Jersey City und New York
Country:USA
Person:Hart, Frederick (P)
Company:Underwood (P) Computing Machine Comp.
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Link to the patent office:
(without guarantee)
 US1254627 (espacenet),  US1254627 (uspto)


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