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Patent:US933486


Patent:US 933486
Title:Calculating Machine
Date:07.09.1909
Place:Seattle (Wa), USA
Country:USA
Person:Carl L. Nelson
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US933486 (espacenet),  US933486 (uspto)


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Aus der Patentschrift US933486

Not found in Espacenet, only in USPTO or www.google.com/patents.
Improvement of Patent:US897768
Improved in Patent:US1052437