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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US975180


Patent:US 975180
Title:Calculating machine
Date:08.11.1910
Place:Brunswick
Country:USA
Person:Trinks, Franz (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US975180 (espacenet),  US975180 (uspto)


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