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All Patents in class 411/919
Patents 1 - 15 of 19
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NumberDatePatenteeTitleType
74,490Feb. 18, 1868J.A. BidwellScrewdriver and Countersinkscrewdriver blades
101,207Mar. 29, 1870A.S. ApgarImprovement in Screw and Screw-Driverscrewdriver blades
161,390Mar. 30, 1875A. CummingsImprovement in wood-screws
173,356Feb. 08, 1876T.J. SloanImprovement in Screw-Driversscrewdriver blades
215,836May 27, 1879G.W. RhinesImprovement in Lock-Nutsauxiliary wrenches
370,255Sep. 20, 1887D.R. HartScrew Driverscrewdriver blades
417,722Dec. 24, 1889D.R. HartScrew Driverscrewdriver blades
544,606Aug. 13, 1895J.R. BalsleyScrew Holder and Driverscrewdriver blades
588,438Aug. 17, 1897R. Whitaker, J.W. JohnsonWrenchalligator wrenches
671,789Apr. 09, 1901C. BorgesonWrenchsocket wrenches
960,244Jun. 07, 1910W.G. AllenManufacture of Screws
975,285Nov. 08, 1910P.L. RobertsonScrew
1,908,080May 09, 1933J.P. ThompsonScrew
2,046,343Jul. 07, 1936H.F. PhillipsScrew
2,046,837Jul. 07, 1936H.F. PhillipsMeans for Uniting a Screw with a Driver
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