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All Patents in class 388
Patents 1 - 15 of 33
First set of recordsNext set of recordsLast set of records
251,541Dec. 27, 1881T.A. EdisonElectric Magnetic Motormotor controls
264,981Sep. 26, 1882E. WestonSystem for the Electrical Transmission of Powerelectric distribution systems
272,365Feb. 13, 1883E. WestonSystem for the Electrical Transmission of Powerelectric distribution systems
275,842Apr. 17, 1883J.C. Cebrian, E.J. MoleraSpeed Regulator and Reversing Device for Electric Motorsmotor regulators
284,382Sep. 04, 1883C.L. ClarkeCircuit and Apparatus for Electric Temperature and Pressure Indicatorpressure gauges
298,550May 13, 1884C.G. BurkeRegulator for Electric Motorsmotor regulators
315,181Apr. 07, 1885F.J. SpragueElectric Motor and Generatorelectric motors
353,367Nov. 30, 1886A.W. MestonGovernor for electric motorsmotor regulators
390,820Oct. 09, 1888N. TeslaRegulator for Alternate-Current Motors
448,326Mar. 17, 1891R. EickemeyerMethod of and apparatus for developing mechanical motion from electrical energy
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
660,908Oct. 30, 1900B.G. LammeVariable-speed electric motorDC motors
672,419Apr. 16, 1901F.A. JohnsonMeans for Controlling Electric Motorsmotor controls
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