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All Patents of Type: screwdriver blades
Patents 1 - 15 of 58
First set of recordsNext set of recordsLast set of records
39,206Jul. 14, 1863J.A. AyresImproved Screwdriverscrewdriver blades
45,854Jan. 10, 1865G. ParrImprovement in Mode of Manufacturing Screw Driversscrewdriver blades
50,021Sep. 19, 1865J.S. McCurdyImprovement in Screw-Driversscrewdriver blades
50,328Oct. 10, 1865W.G. BonwillImprovement in Screw-Driversscrewdriver blades
57,107Aug. 14, 1866C. EversolImproved Screw Driverratcheting screwdrivers
67,014Jul. 23, 1867J.A. AyresImproved Screw-Driverscrewdriver blades
74,490Feb. 18, 1868J.A. BidwellScrewdriver and Countersinkscrewdriver blades
101,207Mar. 29, 1870A.S. ApgarImprovement in Screw and Screw-Driverscrewdriver blades
115,582Jun. 06, 1871J.P. CurtissImprovement in Screwdriversscrewdriver blades
139,069May 20, 1873C. LawImprovement in Screw Driversscrewdriver blades
145,506Dec. 16, 1873S.R. KneelandImprovement in Screwdrivers screwdriver blades
147,654Feb. 17, 1874S.R. KneelandImprovement in Screwdriver bladesscrewdriver blades
157,102Nov. 24, 1874W.F. PattersonImprovement in Screw-Driversscrewdriver blades
158,807Jan. 19, 1875W.F. PattersonImprovement in Screw-Driversscrewdriver blades
173,356Feb. 08, 1876T.J. SloanImprovement in Screw-Driversscrewdriver blades
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