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| All Patents in class 310/41 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 382,279 | May 01, 1888 | N. Tesla | Electro-Magnetic Motor | |
| 909,216 | Jan. 12, 1909 | W.D. Pomeroy | Means for Starting Dynamo Machines | ||
 | 1,541,334 | Jun. 09, 1925 | A.J. Dremel | Electric hair clipper | |
| 1,947,423 | Feb. 13, 1934 | J.M. Naul | Phonograph motor | ||
| 3,049,635 | Aug. 14, 1962 | T.A. Hinderer | Control for Impulse Coupling | ||