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All Patents of Type: drop hammers
Patents 1 - 15 of 39
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NumberDatePatenteeTitleType
GB-163,400,071Jun. 24, 1634A. RotsipenInstruments for cutting, polishing, filing, turning, boring, grinding, sawing, and planing metals for cutting screws, for making files and bullets, for making and rifling barrels, for pressing or printing, and a hammer moved by water or horse powerscrew machines
27,925Apr. 17, 1860M. PeckAtmospheric Hammerdrop hammers
52,894Feb. 27, 1866T. ShawPower Hammerdrop hammers
RE2,398Nov. 27, 1866T. ShawPower Hammerdrop hammers
68,740Sep. 10, 1867T.B. HarrisonPower Hammerdrop hammers
78,867Jun. 16, 1868J. DuffDrop Hammerdrop hammers
78,933Jun. 16, 1868D. DavySteam Balanced Valvedrop hammers
88,980Apr. 13, 1869T.T. ProsserImproved power-hammerdrop hammers
160,483Mar. 02, 1875N.C. StilesDrop Hammerdrop hammers
385,540Jul. 03, 1888H.J. BierhartPower Hammerdrop hammers
429,807Jun. 10, 1890P.D. DupontPower-hammer springdrop hammers
CA-39,771Aug. 10, 1892W.H. LawPower hammerdrop hammers
497,012May 09, 1893C.C. BradleyPower-hammerdrop hammers
545,188Aug. 27, 1895F. Lombard, F.C. BillingsDrop Hammerdrop hammers
547,197Oct. 01, 1895W.J. Belcher, F.C. BillingsDrop Hammerdrop hammers
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