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All Patents in class 408/181
Patents 1 - 15 of 38
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NumberDatePatenteeTitleType
18,003Aug. 11, 1857A. WeeksExpanding auger-bitadjustable drill bits
64,581May 07, 1867J.G. SchmidtImprovement in machines for cutting bungsbung making machines
123,201Jan. 30, 1872G. SchloemerImprovement in machines for making barrel-headsbarrel making machines
144,583Nov. 11, 1873J. WheelockImprovement in Tool-Holders and Cutter-Heads for Boring-Barsportable metal boring and drilling machines
164,953Jun. 29, 1875F. WilligImprovement in Expansible Bitsadjustable drill bits
255,846Apr. 04, 1882L.R. FaughtBoring-bardrilling and boring
260,497Jul. 04, 1882W.L. ParmeleeImprovements in Expansion-Bitsadjustable drill bits
296,242Apr. 01, 1884W. SteersExtension-bitauger bits
430,358Jun. 17, 1890H. Westbrook, R. BurnsScrew Cutting Devicetaps and dies
442,828Dec. 16, 1890C.P. RussellScrew-cutting dietaps and dies
572,099Dec. 01, 1896G. BettcherSafety Socket for Taps or Drillstap and die holders
594,615Nov. 30, 1897B.H. FowleExpansive Bitadjustable drill bits
719,089Jan. 27, 1903F.W. ConantScrew Plate and Diedrill accessories
807,956Dec. 19, 1905W.B. McElneyExtension-bitauger bits
950,782Mar. 01, 1910A.B. JenningsExpansible bitauger bits
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