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| All Patents in class 388/816 | |||||
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| Number | Date | Patentee | Title | Type | |
| 353,367 | Nov. 30, 1886 | A.W. Meston | Governor for electric motors | motor regulators | |
| 1,128,005 | Feb. 09, 1915 | J.D. Nies, A. Kimble | Adjustable speed control for electric motors | electric motors | |
| 1,786,772 | Dec. 30, 1930 | J.D. Nies | Motor-control means | electric motors | |