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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US212498


Patent:US 212498
Title:Improvement in tax calculators
Date:18.02.1879
Place:Chicago, Illinois, USA
Country:USA
Person:Pettibone, Philo F. (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US212498 (espacenet),  US212498 (uspto)


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