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All Patents in class 411/403
Patents 1 - 9 of 9
First set of recordsLast set of records
101,207Mar. 29, 1870A.S. ApgarImprovement in Screw and Screw-Driverscrewdriver blades
376,584Jan. 17, 1888H.D. ConeWrenchratchet wrenches
479,175Jul. 19, 1892C.D. RogersWood Screw and Method of Making the Same
960,244Jun. 07, 1910W.G. AllenManufacture of Screws
975,285Nov. 08, 1910P.L. RobertsonScrew
1,908,080May 09, 1933J.P. ThompsonScrew
4,512,220Apr. 23, 1985W.T. Pagac, M.L. Barnhill, IIIFast Lead Socket Wrenchwrench sockets
4,882,957Nov. 28, 1989B.P. Fleming, T.M. Vozenilek, R.B. WrightSocket Wrench Openingwrench sockets
5,277,531Jan. 11, 1994B. KrivecDevice having socket with retention surfaces
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