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All Patents in class 81/448
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
39,206Jul. 14, 1863J.A. AyresImproved Screwdriverscrewdriver blades
306,491Oct. 14, 1884G.W. JackmanScrew holding screwdriverscrewdriver blades
518,472Apr. 17, 1894S.I. SnyderScrew Driverscrewdriver blades
532,830Jan. 22, 1895S.I. SnyderScrew-Driverscrewdriver blades
821,328May 22, 1906H.D. BartlettHand-Operated Toolscrewdriver handles
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