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Patent:US2228830


Patent:US 2228830
Title:Calculating machine
Date:14.01.1941
Place:Chemnitz und Siegmar-Schonau
Country:USA
Person:Werner Kniehahn
Company:Wanderer (P) Werke AG
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2228830 (espacenet),  US2228830 (uspto)


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