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Patents for W. H. Spencer
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
59,683Nov. 13, 1866D.S. TroutImprovement in Wheelwright's Machineswheelwright
556,015Mar. 10, 1896C.D. MarshMolding or sticking machinemolders
917,070Apr. 06, 1909E.P. HollyImpelling Device
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