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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2233073


Patent:US 2233073
Title:Calculating Device
Date:25.02.1941
Place:
Country:USA
Person:G. E. Brann
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2233073 (espacenet),  US2233073 (uspto)


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Aus der Patentschrift US2233073