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All Patents in class 388
Patents 16 - 30 of 49
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NumberDatePatenteeTitleType
551,371Dec. 17, 1895R. EickemeyerMeans for operating and regulating speed of electric motors
564,558Jul. 21, 1896R. EickemeyerSpeed-regulator for electric motors
597,418Jan. 18, 1898F.A. JohnsonRegulation of dynamo-electric machineryelectric motors
653,725Jul. 17, 1900D.C. WoodwardElectric Motorelectric motors
660,908Oct. 30, 1900B.G. LammeVariable-speed electric motorDC motors
672,419Apr. 16, 1901F.A. JohnsonMeans for Controlling Electric Motorsmotor controls
673,239Apr. 30, 1901J. BurkeRegulation and control of electric motorsmotor controls
740,101Sep. 29, 1903W.A. DickMethod of operating electric motorsinduction motors
757,394Apr. 12, 1904R. EickemeyerMeans for variably operating and controlling electric motors
793,848Jul. 04, 1905C.S. RenoElectric controllerelevators and lifts
838,547Dec. 18, 1906A. KimbleElectric motor and method of controlling the sameelectric motors
850,277Apr. 16, 1907C.R. TatemSystem of motor controlmotor controls
913,691Mar. 02, 1909J. BurkeVariable-speed motorDC motors
1,053,940Feb. 18, 1913J. BurkeUniversal motoruniversal motors
1,112,784Oct. 06, 1914E.L. Gale, Sr.Means for Controlling Electric Currentsmotor controls
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