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| All Patents in class 307/108 | |||||
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| Number | Date | Patentee | Title | Type | |
| 462,418 | Nov. 03, 1891 | N. Tesla | Method of and apparatus for electrical conversion and distribution | ||
| 514,168 | Feb. 06, 1894 | N. Tesla | Means for generating electric currents | ||
| 1,376,081 | Apr. 26, 1921 | C.W. De Mooy | High-frequency Generator of the Transformer Type | electric generators | |