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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US883800


Patent:US 883800
Title:Calculating Rule
Date:07.04.1908
Place:
Country:USA
Person:W. S. Harlow
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US883800 (espacenet),  US883800 (uspto)


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Aus der Patentschrift US883800