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Patent:US1255828


Patent:US 1255828
Title:Combined type-writing and computing machine
Date:05.02.1918
Place:New York
Country:USA
Person:Fred Walsleben
Company:Underwood (P) Computing Machine Comp.
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Keywords:
Link to the patent office:
(without guarantee)
 US1255828 (espacenet),  US1255828 (uspto)


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