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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2378863


Patent:US 2378863
Title:Mechanical computing device
Date:19.06.1945
Place:Chicago
Country:USA
Person:Chester A. Posson
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2378863 (espacenet),  US2378863 (uspto)


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