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| All Patents in class 318/278 | |||||
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| Number | Date | Patentee | Title | Type | |
| 485,620 | Nov. 08, 1892 | J.P. Fiske | Electric Motor Controller | motor controls | |
| 681,133 | Aug. 20, 1901 | T.S. Perkins | Starting Apparatus for Electric Motors | motor controls | |