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| All Patents in class 318/146 | |||||
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| Number | Date | Patentee | Title | Type | |
| 264,981 | Sep. 26, 1882 | E. Weston | System for the Electrical Transmission of Power | electric distribution systems | |
| 272,365 | Feb. 13, 1883 | E. Weston | System for the Electrical Transmission of Power | electric distribution systems | |
| 2,119,715 | Jun. 07, 1938 | I.O. Miner | Motor Control | ||