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All Patents in class 310/83
Patents 1 - 15 of 30
First set of recordsNext set of recordsLast set of records
159,028Jan. 26, 1875G.F. GreenImprovement in electro-magnetic dental toolselectrical devices
595,731Dec. 21, 1897M.B. PengnetElectric motorelectric motors
606,549Jun. 28, 1898E. HolmesPortable electric drillhandheld power tools
644,591Mar. 06, 1900W.P. FreemanElectric drill, &c.drill presses
781,062Jan. 31, 1905D.J. Hauss, C.W. MilesElectric or hand-powered breast drillhandheld power tools
810,444Jan. 23, 1906C.W. TheilElectric drillhandheld power tools
956,849May 03, 1910W.C. HafemeisterPortable electric drillhandheld power tools
993,352May 30, 1911W.O. DuntleyElectric drillhandheld drills
1,104,736Jul. 21, 1914F. SchneiderGearinghandheld drills
1,109,325Sep. 01, 1914W.O. DuntleyElectric drillhandheld drills
1,172,169Feb. 15, 1916F. SchneiderElectrically-operated toolhandheld power tools
1,229,401Jun. 12, 1917S.D. Black, A.G. DeckerDrill gearinghandheld power tools
1,253,199Jan. 08, 1918H.L. ZabriskieOscillating motor
1,372,045Mar. 22, 1921R.G. SedgewickValve grinderhandheld power tools
1,445,294Feb. 13, 1923H.P. CampElectric hand drillhandheld drills
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