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Patent:US1730106


Patent:US 1730106
Title:Denominator attachment for adding machines
Date:01.10.1929
Place:
Country:USA
Person:Nelson White
Company:Burroughs (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1730106 (espacenet),  US1730106 (uspto)


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Aus der Patentschrift US1730106