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Patent:US2237873


Patent:US 2237873
Title:Calculating Device
Date:08.04.1941
Place:
Country:USA
Person:F. J. Barok
Company:
Internal Links:Kreisrechner
Keywords:
Link to the patent office:
(without guarantee)
 US2237873 (espacenet),  US2237873 (uspto)


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Aus der Patentschrift US2237873