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Patent:US2258090


Patent:US 2258090
Title:Bookkeeping machine
Date:07.10.1941
Place:Chemnitz und Siegmar-Schönau
Country:USA
Person:Heinrich Konrad Friedrich Ewald
Company:Wanderer (P) Werke vorm. Winklhofer und Jaenicke
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Link to the patent office:
(without guarantee)
 US2258090 (espacenet),  US2258090 (uspto)


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