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| All Patents in class 310/245 | |||||
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| Number | Date | Patentee | Title | Type | |
| 740,635 | Oct. 06, 1903 | C.A. Eck | Brush-holder | motor brush holders | |
| 2,954,492 | Sep. 27, 1960 | W.C. Nussbaum, P.R. de Voe | Brush ring assembly | electric motors | |