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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2802272


Patent:US 2802272
Title:Area calculator
Date:13.08.1957
Place:
Country:USA
Person:Martin Warren, Kuykendall Roy
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2802272 (espacenet),  US2802272 (uspto)


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Aus der Patentschrift US2802272