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| All Patents in class 388/808 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 448,326 | Mar. 17, 1891 | R. Eickemeyer | Method of and apparatus for developing mechanical motion from electrical energy | |
 | 913,691 | Mar. 02, 1909 | J. Burke | Variable-speed motor | |