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Patent:USRE20984


Patent:US RE20984
Title:Slide Rule
Date:24.01.1939
Place:
Country:USA
Person:Keuffel, Adolf W. (P)
Company:
Internal Links:Rechenschieber
Keywords:
Link to the patent office:
(without guarantee)
 USRE20984 (espacenet),  USRE20984 (uspto)


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