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| All Patents in class 310/249 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 291,728 | Jan. 08, 1884 | E. Hester | Joiner's Marking-Gage | |
| 397,492 | Feb. 12, 1889 | R. Eickemeyer | Brush for electric generators | ||
 | RE11,787 | Nov. 14, 1899 | C.R. Meston | Electric motor | |
 | 959,634 | May 31, 1910 | S. Sparrow | Brush or collector for electrical machines | |
| 973,836 | Oct. 25, 1910 | H.L. Zabriskie | Brush for dynamo-electric machines | ||
| 1,651,059 | Nov. 29, 1927 | J.T. Janette | Brush-holder connection | ||