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| All Patents in class 307/36 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 309,536 | Dec. 23, 1884 | W.K. Freeman | Regulator for Electric Generators & Motors | ||
| 316,091 | Apr. 21, 1885 | E. Weston | Electro-Magnetic Motor | ||
 | 372,943 | Nov. 08, 1887 | W. Stanley, Jr. | System of electrical distribution and conversion | |