| All Patents in class 318/293 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 291,650 | Jan. 08, 1884 | C.J. Van Depoele | Current Regulator for Electric Motors |
| | 294,041 | Feb. 26, 1884 | W. Hochhausen | Automatic Brake for Electric Motors |
 | 335,781 | Feb. 09, 1886 | F.J. Sprague | Electric Dynamic Motor |
| | 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 |
| | 1,963,827 | Jun. 19, 1934 | H.C. Clay | Variable Speed Unit Control |
| | 3,586,949 | Jun. 22, 1971 | K.D. Spear, C.F. Raber | Three-Phase Motor Control System |
| | 4,568,864 | Feb. 04, 1986 | E.T. Gisske | Electric motor control for a pipe bender |
