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Patent:US1220545


Patent:US 1220545
Title:Calculating Instrument
Date:27.03.1917
Place:
Country:USA
Person:E. E. Phinney
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1220545 (espacenet),  US1220545 (uspto)


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Aus der Patentschrift US1220545