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All Patents in class 267/137
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
144,058Oct. 28, 1873J.C. ButterfieldImprovement in power-hammersdrop hammers
358,672Mar. 01, 1887W.R. Jenkins, Jr.Power Hammerpower hammers
1,725,212Aug. 20, 1929F. SchneiderPower hammer
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