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All Patents in class 83/200
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
146,846Jan. 27, 1874W.X. StevensImprovement in shears for cutting off bar-ironmetalworking machines
833,294Oct. 16, 1906G.J. BlumPunching and shearing mechanismmetal punching machines
1,389,565Aug. 30, 1921J. JensenMachine elementmetal punching machines
1,831,447Nov. 10, 1931R. HeinrichMetal cutting instrumentmetal shearing machines
5,170,689Dec. 15, 1992J. DvorakMetal working machinemetal punching machines
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