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All Patents in class 318/293
Patents 1 - 8 of 8
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
  291,650Jan. 08, 1884C.J. Van DepoeleCurrent Regulator for Electric Motors
  294,041Feb. 26, 1884W. HochhausenAutomatic Brake for Electric Motors
335,781Feb. 09, 1886F.J. SpragueElectric Dynamic Motor
  454,462Jun. 23, 1891R. EickemeyerElectric elevator
  609,016Aug. 16, 1898R. EickemeyerElectric elevator
  714,862Dec. 02, 1902H.W. BuckControlling Electric Motors
  1,963,827Jun. 19, 1934H.C. ClayVariable Speed Unit Control
  3,586,949Jun. 22, 1971K.D. Spear, C.F. RaberThree-Phase Motor Control System
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