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Patents for D. L. Humphrey
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
98,265Dec. 28, 1869J. HumphreyImprovement in boring and mortising-machinemortising machines
116,932Jul. 11, 1871A. CreaseWoodworker's Visewoodworkers vises
122,320Jan. 02, 1872J. HutherImprovement in sawssaw teeth
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