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All Patents of Type: drill bits
Patents 1 - 15 of 46
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NumberDatePatenteeTitleType
9,313XJan. 11, 1836W.R. JonesDrills for metaldrill bits
82Nov. 17, 1836G. PageSpiral bit with countersink for setting screwsdrill bits
10,744Apr. 04, 1854A. PeaseDrill for metal gun-barrelsdrill bits
11,587Aug. 22, 1854B.F. GravesTool for boring recesses for casters, &c.drill bits
22,394Dec. 21, 1858N.S. White, A. DenioMethod of attaching cutting-tips to auger-shankstool making machines
22,474Dec. 28, 1858H. StoneExpanding bitdrill bits
27,782Apr. 10, 1860L. EamesMortising-toolmortise chisels
47,812May 23, 1865W.W. Grier, R.H. BoydImproved drill-bitdrill bits
74,870Feb. 25, 1868P.A. WhitneyDrill and Countersinkmetalworking countersinks
79,276Jun. 23, 1868E. SullivanReamerreamers
87,796Mar. 16, 1869H.L. ShailerDouble-twist augerdrill bits
88,760Apr. 06, 1869C. WhitehouseImprovement in bits and augersdrill bits
100,772Mar. 15, 1870D. KellyCentererdrill bits
CA-669Oct. 22, 1870J. LeydenImprovements in expansion drillsdrill bits
193,406Jul. 24, 1877D.E. HendersonImprovement in augersdrill bits
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