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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1049716


Patent:US 1049716
Title:Calculating-machine
Date:07.01.1913
Place:St. Louis
Country:USA
Person:Hopkins, William (P) Wallace
Company:
Internal Links:Moon-Hopkins
Keywords:
Link to the patent office:
(without guarantee)
 US1049716 (espacenet),  US1049716 (uspto)


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