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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1149872


Patent:US 1149872
Title:Calculating-machine
Date:10.08.1915
Place:Brunswick, Germany
Country:USA
Person:Trinks, Franz (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1149872 (espacenet),  US1149872 (uspto)


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