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Patent:US1279687


Patent:US 1279687
Title:Combined type-writing and computing machine
Date:24.09.1918
Place:Hartford, CT
Country:USA
Person:Hanson, Hans (P)
Company:Underwood (P) Computing Machine Com.
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Link to the patent office:
(without guarantee)
 US1279687 (espacenet),  US1279687 (uspto)


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