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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1426829


Patent:US 1426829
Title:Calculating Device
Date:22.08.1922
Place:
Country:USA
Person:G. R. Flynn
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1426829 (espacenet),  US1426829 (uspto)


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Aus der Patentschrift US1426829