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Patents for Frank A. Shoemaker
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
371,480Oct. 11, 1887F.A. ShoemakerBelt-shifterindustrial machine pulleys and belt drive mechanisms
384,795Jun. 19, 1888F.A. ShoemakerGrinding Machinemetal lathe accessories and attachments
409,457Aug. 20, 1889F.A. Shoemaker, J.W. DennisSteam-enginesteam engines
424,183Mar. 25, 1890F.A. Shoemaker, J.W. DennisReversing-valve for steam-enginessteam engine valves
437,941Oct. 07, 1890F.A. ShoemakerSteam-enginesteam engines
728,707May 19, 1903J. HardillEngine Governorsteam engine governors
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