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Patent:US1238055


Patent:US 1238055
Title:Combined type-writing and computing machine
Date:21.08.1917
Place:Jersey City, NJ und New York
Country:USA
Person:John N. Thornton
Company:Underwood (P) Computing Machine Comp.
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Keywords:
Link to the patent office:
(without guarantee)
 US1238055 (espacenet),  US1238055 (uspto)


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