| All Patents in class 318/293 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 291,650 | Jan. 08, 1884 | C.J. Van Depoele | Current Regulator for Electric Motors | motor regulators |
| 294,041 | Feb. 26, 1884 | W. Hochhausen | Automatic Brake for Electric Motors | motor brakes |
| 335,781 | Feb. 09, 1886 | F.J. Sprague | Electric Dynamic Motor | DC motors |
| 454,462 | Jun. 23, 1891 | R. Eickemeyer | Electric elevator | |
| 609,016 | Aug. 16, 1898 | R. Eickemeyer | Electric elevator | |
| 714,862 | Dec. 02, 1902 | H.W. Buck | Controlling Electric Motors | motor controls |
| 1,963,827 | Jun. 19, 1934 | H.C. Clay | Variable Speed Unit Control | industrial machine speed and direction changing mechanisms |
| 3,586,949 | Jun. 22, 1971 | K.D. Spear, C.F. Raber | Three-Phase Motor Control System | motor controls |
