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All Patents of Type: drill sharpening machines
Patents 1 - 15 of 16
First set of recordsNext set of recordsLast set of records
NumberDatePatenteeTitleType
270,366Jan. 09, 1883W.H. Thorne, J.S. BancroftDrilldrill sharpening machines
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
GB-122,735Feb. 06, 1919P. Hunt, H.W. Hunt, H. HuntImprovements in twist drill point grinding machinesdrill grinders
FR-489,933Mar. 22, 1919P. Hunt, H.W. Hunt, H. HuntMachine for sharpening helicoidal drill tipsdrill grinders
FR-495,289Oct. 03, 1919P. Hunt, H.W. Hunt, H. HuntMachine to groove and cut twist drillsdrill grinders
CA-209,162Mar. 08, 1921P. Hunt, H.W. Hunt, H. HuntTwist drill point grinding machinedrill grinders
GB-168,634Sep. 08, 1921P. Hunt, H.W. Hunt, H. HuntImprovements in twist drill point grinding machinesdrill grinders
FE-23,110Oct. 04, 1921P. Hunt, H.W. Hunt, H. HuntMachine to groove and cut twist drillsdrill grinders
DE-375,851May 19, 1923P. Hunt, H.W. Hunt, H. HuntDrill grinding machinedrill grinders
GB-275,071Aug. 04, 1927P. Hunt, H.W. HuntImprovements in twist drill point grinding and thinning machinesdrill grinders
2,147,227Feb. 14, 1939G.B. AmblerDrill sharpening machinedrill sharpening machines
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