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| All Patents in class 318/158 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 276,569 | May 01, 1883 | L. Daft | Electric Railway | ||
| 714,786 | Dec. 02, 1902 | M.W. Day | Controlling Electric Motors | ||
| 924,786 | Jun. 15, 1909 | H.D. James | System of Electric Motor Control | ||
| 2,119,715 | Jun. 07, 1938 | I.O. Miner | Motor Control | ||
| 2,600,988 | Jun. 17, 1952 | R.B. Lesher, C.E. Greene | Constant Surface Speed Lathe | ||
| 2,908,852 | Oct. 13, 1959 | R.M. Henderson | Multiple Unit Hump Control | ||