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All Patents of Type: drill grinders
Patents 1 - 15 of 35
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NumberDatePatenteeTitleType
201,449Mar. 19, 1878A.K. RiderDrill Grinderdrill grinders
299,433May 27, 1884A. Coventry, W.F. SmithMachinery for Grinding or Sharpening Drillsdrill 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
614,092Nov. 15, 1898G.T. EamesDrill-grinderdrill sharpening machines
622,212Apr. 04, 1899R. DuttonTwist-drill grinderdrill grinders
643,703Feb. 20, 1900H.P. WhiteDrill-grinding machinesdrill sharpening machines
643,927Feb. 20, 1900O.S. WalkerDrill-grinderdrill sharpening machines
684,890Oct. 22, 1901H.P. WhiteDrill-grinderdrill sharpening machines
704,348Jul. 08, 1902J.N. LapointeGrinding-machinedrill sharpening machines
1,253,291Jan. 15, 1918W.A. SmithDrill Sharpenerdrill grinders
1,253,292Jan. 15, 1918W.A. SmithDolly Mechanism for Drill Sharpenersdrill grinders
GB-112,879Jan. 31, 1918P. Hunt, H.W. Hunt, H. HuntNew or improved construction of twist drill grooving and clearance grinding (or milling) machinesdrill grinders
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