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Patent:US884729


Patent:US 884729
Title:Computing Slide Rule
Date:14.04.1908
Place:
Country:USA
Person:H. Gröndahl
Company:
Internal Links:Rechenschieber
Keywords:
Link to the patent office:
(without guarantee)
 US884729 (espacenet),  US884729 (uspto)


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Aus der Patentschrift US884729