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| All Patents in class 310/209 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 714,824 | Dec. 02, 1902 | A. Schwartz | Process of Starting Induction Motors | ||
| 829,975 | Sep. 04, 1906 | J.C. Lincoln | Variable Speed Electric Motor | ||
 | 847,088 | Mar. 12, 1907 | J.C. Lincoln | Variable Speed Electric Motor | |
| 1,194,645 | Aug. 15, 1916 | J.C. Lincoln | Variable Speed Electric Motor | ||
| 1,956,041 | Apr. 24, 1934 | J.M. Naul | Radio-tuner motor | ||
| 3,032,667 | May 01, 1962 | A.J. Sorchy | Motor Brake | ||