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| Patents for Electro-Dynamic Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 227,622 | May 18, 1880 | W.W. Griscom | Electro-Magnetic Motor | |
 | 227,623 | May 18, 1880 | W.W. Griscom | Electro-Magnetic Motor | |
| 397,424 | Feb. 05, 1889 | H.N. Weidner, W.W. Griscom | Connection of Electrical Circuits | ||
| 408,232 | Aug. 06, 1889 | W.W. Griscom | Means for Propelling Vehicles by Secondary Batteries | ||
| 408,233 | Aug. 06, 1889 | W.W. Griscom | Vehicle Motor | ||