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All Patents of Type: drill grinders
Patents 1 - 15 of 51
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NumberDatePatenteeTitleType
104,982Jul. 05, 1870S.A. MorseImprovement in grinding-rest for twist-drillsdrill grinders
153,401Jul. 21, 1874C. Van HaagenImprovement in machines for sharpening twist-drillsdrill grinders
159,723Feb. 09, 1875C. Van HaagenImprovement in grinding apparatusdrill grinders
201,449Mar. 19, 1878A.K. RiderDrill Grinderdrill grinders
299,433May 27, 1884A. Coventry, W.F. SmithMachinery for Grinding or Sharpening Drillsdrill grinders
388,784Aug. 28, 1888F. MossbergTwist-drill-grinding attachmentdrill grinders
389,095Sep. 04, 1888F. MossbergTwist-drill-grinding attachmentdrill grinders
411,845Oct. 01, 1889O.S. WalkerDrill-grinding machinedrill grinders
425,839Apr. 15, 1890O.S. WalkerTwist-drill-grinding machinedrill grinders
428,426May 20, 1890J.H. Storey, H.J. BamfordMachine for grinding twist or other drillsdrill grinders
497,095May 09, 1893T. HallDrill-grinderdrill grinders
508,268Nov. 07, 1893J.S. BancroftMachine for Sharpening Drillsdrill grinders
523,897Jul. 31, 1894J.J. KenyonDrill Grinding Machinedrill grinders
607,306Jul. 12, 1898O.S. WalkerTwist-drill-grinding machinedrill grinders
613,127Oct. 25, 1898W. EamesTwist Drill Grinderdrill grinders
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