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All Patents of Type: electrical devices
Patents 1 - 15 of 771
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NumberDatePatenteeTitleType
8,736XMar. 31, 1835D. HarringtonGalvanic electricity applied to cure diseaseselectric batteries
132Feb. 25, 1837T. DavenportImprovement in propelling machinery by magnetism and electro-magnetismDC motors
26,558Dec. 27, 1859G.W. BeardsleeImproved magneto-electric machineelectric motors
96,332Nov. 02, 1869G. LittleImprovement in Electro-Magnetic Motorselectric motors
CA-686Nov. 05, 1870H. WoodImprovement in electro magnetic machines and magnetselectric motors
CA-919Apr. 11, 1871A. Ross, M.H. UtleyImprovements on electro-magnetic motorselectric motors
138,855May 13, 1873S.C. CarterElectro-Magnetic Motorselectric motors
159,028Jan. 26, 1875G.F. GreenImprovement in electro-magnetic dental toolselectrical devices
171,087Dec. 14, 1875J. BishopElectro Magnetic Engineselectric motors
200,032Feb. 05, 1878T.A. EdisonSynchronous Movements for Electric Telegraphstelegraphic apparatus
227,622May 18, 1880W.W. GriscomElectro-Magnetic MotorDC motors
227,623May 18, 1880W.W. GriscomElectro-Magnetic MotorDC motors
227,845May 18, 1880W. SawyerDynamo Electric MachineDC motors
228,888Jun. 15, 1880W.W. GriscomRegulating Electro-Magnetic Motorsmotor regulators
238,631Mar. 08, 1881C.E. BallDynamo or Magneto-Electric Machineelectric generators
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