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All Patents of Type: drill bits
Patents 1 - 15 of 81
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NumberDatePatenteeTitleType
4,509XAug. 07, 1826H. BranchMortising machinemortising machines
8,752XApr. 08, 1835N.J. LampmanWood augerdrill bits
82Nov. 17, 1836G. PageSpiral bit with countersink for setting screwsdrill bits
RE72Jul. 30, 1845E. L'HommedieuImprovement in machinery for manufacturing double-twist screw-augersdrill 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
21,179Aug. 17, 1858C.L. BarnesBit with Detachable Cutterdrill bits
21,960Nov. 02, 1858W.O. HickokTap for Cutting Wooden Screwsdrill 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
39,288Jul. 21, 1863C.W. HarrisImproved Bung Cutterdrill bits
41,517Feb. 09, 1864G.W. LowPump Boring Bitsdrill bits
45,483Dec. 20, 1864A. EliaersBit for Undercut Holesdrill bits
46,854Mar. 14, 1865E.C. GilletteImprovement in Augersdrill bits
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