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Patent:US2229834


Patent:US 2229834
Title:Negative total lock for accounting machines
Date:28.01.1941
Place:Bridgeport, CT und New York
Country:USA
Person:Anderson, Walter (P)
Company:Underwood Elliott-Fisher (P) Comp.
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Link to the patent office:
(without guarantee)
 US2229834 (espacenet),  US2229834 (uspto)


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