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All Patents of Type: drill grinders
Patents 1 - 13 of 13
First 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
1,258,998Mar. 12, 1918J. DitsonDrill Sharpenerdrill grinders
2,142,923Jan. 03, 1939R.P. StockingDrill grinding machinedrill grinders
2,147,227Feb. 14, 1939G.B. AmblerDrill sharpening machinedrill sharpening machines
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