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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US820226


Patent:US 820226
Title:Calculator
Date:08.05.1906
Place:Guatemala
Country:USA
Person:Karl heinrich Marckwordt
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US820226 (espacenet),  US820226 (uspto)


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