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| All Patents in class 318/445 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 266,239 | Oct. 17, 1882 | E. Weston | System for the Electrical Transmission of Power | ||
| 309,536 | Dec. 23, 1884 | W.K. Freeman | Regulator for Electric Generators & Motors | ||
| 2,167,204 | Jul. 25, 1939 | H.A. Hadley | Automatic Beam Stop | ||