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| All Patents in class 307/101 | |||||
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| Number | Date | Patentee | Title | Type | |
| 649,972 | May 22, 1900 | T.S. Watson | Electric-motor-controlling device | dental apparatus | |
| 723,840 | Mar. 31, 1903 | A.L. De Leeuw | Controlling Switch System | machine tool controls | |
| 900,555 | Oct. 06, 1908 | B.G. Lamme | Controlling System for Electric Motors | motor controls | |
| 1,367,298 | Feb. 01, 1921 | J. Burke | Alternating-current motor and generator | AC motors | |
| 2,682,631 | Jun. 29, 1954 | O. Lindfors | Single Phase Motor Control | motor controls | |