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All Patents in class 81/438
Patents 1 - 15 of 34
First set of recordsNext set of recordsLast set of records
157,102Nov. 24, 1874W.F. PattersonImprovement in Screw-Driversscrewdriver blades
158,807Jan. 19, 1875W.F. PattersonImprovement in Screw-Driversscrewdriver blades
204,812Jun. 11, 1878R.S. GladdingImprovement in Screw-Driversscrewdriver blades
214,785Apr. 29, 1879E. MorrisImprovement in Screwdrivers
219,425Sep. 09, 1879G. AbramsImprovement in Crank Screw-Driversscrewdriver mechanisms
249,101Nov. 01, 1881H.A. SawtellScrew-Driverscrewdriver blades
274,042Mar. 13, 1883H.V. SmithConvertible screwdriver and borer
279,917Jun. 26, 1883F.J. ColvinScrew-Driverscrewdriver blades
386,263Jul. 17, 1888J.T. PedersenTool Holder and Tools for the Same
484,654Oct. 18, 1892W.E. DailyScrew-drivereggbeater drills
504,757Sep. 12, 1893A. SchuermannScrewdriverscrewdriver blades
510,104Dec. 05, 1893J. UhlImprovements in Bit-Stocks or Tools for Holding Screw-Hooks, or Like Articlesbrace chucks
624,875May 09, 1899W.D. Arnott, B.E. SawyerScrew Driverscrewdriver blades
674,719May 21, 1901G.L. WoodruffScrew-driverspiral screwdrivers
686,424Nov. 12, 1901W.J. SmithScrewdriver Kitscrewdrivers
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