| Patents for Frank J. Sprague |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 295,454 | Mar. 18, 1884 | F.J. Sprague | Electro Dynamic Motor | electric motors |
| 313,546 | Mar. 10, 1885 | F.J. Sprague | Electric Dynamic Motor | DC motors |
| 315,180 | Apr. 07, 1885 | F.J. Sprague | Electro Dynamic Motor | electric motors |
| 315,181 | Apr. 07, 1885 | F.J. Sprague | Electric Motor and Generator | electric motors |
| 315,183 | Apr. 07, 1885 | F.J. Sprague | Electro Dynamic Motor | electric motors |
| 318,668 | May 26, 1885 | F.J. Sprague | Method of Operating Electric Railway Trains | electric railroads |
| 321,147 | Jun. 30, 1885 | F.J. Sprague | Electro Dynamic Motor | electric motors |
| 324,891 | Aug. 25, 1885 | F.J. Sprague | Electric Dynamic Motor | DC motors |
| 335,781 | Feb. 09, 1886 | F.J. Sprague | Electric Dynamic Motor | DC motors |
| 466,448 | Jan. 05, 1892 | F.J. Sprague | Commutator-brush and holder for dynamo-electric machines and motors | motor brushes |
