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Patent:US1598600


Patent:US 1598600
Title:Calculating Apparatus
Date:07.09.1926
Place:
Country:USA
Person:J. E. C. Butterfield
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1598600 (espacenet),  US1598600 (uspto)


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Aus der Patentschrift US1598600