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All Patents in class 310
Patents 1 - 15 of 706
First set of recordsNext set of recordsLast set of records
132Feb. 25, 1837T. DavenportImprovement in propelling machinery by magnetism and electro-magnetismDC motors
10,940May 16, 1854P.B. TylerMethod of nibbing saw-teethsawblades
26,558Dec. 27, 1859G.W. BeardsleeImproved magneto-electric machineelectric motors
46,015Jan. 24, 1865J.W. MoyerImprovement in sawing machinesscrollsaws
96,332Nov. 02, 1869G. LittleImprovement in 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
174,609Mar. 07, 1876R. WrightImprovement in Machines for Bending Tubing
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
255,236Mar. 21, 1882C.E. BallElectric drillhandheld drills
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