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All Patents of Type: drill grinders
Patents 1 - 15 of 22
First set of recordsNext set of recordsLast set of records
508,268Nov. 07, 1893J.S. BancroftMachine for Sharpening Drillsdrill 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
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
1,258,998Mar. 12, 1918J. DitsonDrill Sharpenerdrill grinders
GB-122,735Feb. 06, 1919P. Hunt, H.W. Hunt, H. HuntImprovements in twist drill point grinding machinesdrill grinders
FR-489,933Mar. 22, 1919H. Hunt, H.W. Hunt, P. HuntMachine for sharpening helicoidal drill tipsdrill grinders
FR-495,289Oct. 03, 1919H. Hunt, H.W. Hunt, P. HuntMachine to groove and cut twist drillsdrill grinders
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