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| All Patents in class 310/226 | |||||
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| Number | Date | Patentee | Title | Type | |
| 315,183 | Apr. 07, 1885 | F.J. Sprague | Electro Dynamic Motor | electric motors | |
| 1,238,213 | Aug. 28, 1917 | H.R. Stuart | Electric generator and motor | electric generators | |