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Frank M. Underwood


Frank M. Underwood
Person

Page Sections
Documents


Documents

DateDocument Name & DetailsDocuments
24 December 1895Muffler for Engines.
United States Patent US 552,085
Frank M. Underwood

PDF
- 156KB - 2 pages
14 January 1896Sparker for Gas and Gasoline Engines
United States Patent US 553,181
Frank M. Underwood

PDF
- 359KB - 4 pages





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