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All Patents of Type: drill bits
Patents 1 - 15 of 29
First set of recordsNext set of recordsLast set of records
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
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
241,481May 17, 1881L.R. FaughtBoring-bardrill bits
241,482May 17, 1881L.R. FaughtBoring-bardrill bits
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