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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US935565


Patent:US 935565
Title:Calculating machine
Date:28.09.1909
Place:Brunswick
Country:USA
Person:Trinks, Franz (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US935565 (espacenet),  US935565 (uspto)


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