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| All Patents in class 200/325 | |||||
| Number | Date | Patentee | Title | Type | |
| 485,620 | Nov. 08, 1892 | J.P. Fiske | Electric Motor Controller | motor controls | |
| 2,138,279 | Nov. 29, 1938 | R.F. Kneisley | Control switch | woodworking machine mechanisms | |