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Patents for P. P. Burtis
Patents 1 - 5 of 5
First set of recordsLast set of records
156,066Oct. 20, 1874E. SchlenkerImprovement in visesbench vises
162,194Apr. 20, 1875E. SchlenkerImprovement in bolt-threading machinesmetal threading machines
166,730Aug. 17, 1875E. SchlenkerImprovement in hoisting-machines or elevatorselevators and lifts
168,135Sep. 28, 1875O.C. BurdictMachine For Forging Wrench-Bar Headswrench jaw components
182,230Sep. 12, 1876E. SchlenkerImprovement in paper-cutting machinespaper cutting machines
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