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| All Patents in class 388/803 | |||||
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| Number | Date | Patentee | Title | Type | |
| 272,365 | Feb. 13, 1883 | E. Weston | System for the Electrical Transmission of Power | electric distribution systems | |
| 313,546 | Mar. 10, 1885 | F.J. Sprague | Electric Dynamic Motor | DC motors | |