| All Patents of Type: DC motors |
Patents 1 -
15
of 31
      |
| Number | Date | Patentee | Title | Type |
| 132 | Feb. 25, 1837 | T. Davenport | Improvement in propelling machinery by magnetism and electro-magnetism | DC motors |
| 227,622 | May 18, 1880 | W.W. Griscom | Electro-Magnetic Motor | DC motors |
| 227,623 | May 18, 1880 | W.W. Griscom | Electro-Magnetic Motor | DC motors |
| 227,845 | May 18, 1880 | W. Sawyer | Dynamo Electric Machine | DC motors |
| 248,435 | Oct. 18, 1881 | T.A. Edison | Utilizing Electricity as Motive Power | DC motors |
| 264,982 | Sep. 26, 1882 | E. Weston | Electro Magnetic Motor | DC motors |
| 313,546 | Mar. 10, 1885 | F.J. Sprague | Electric Dynamic Motor | DC motors |
| 316,091 | Apr. 21, 1885 | E. Weston | Electro-Magnetic Motor | DC motors |
| 316,092 | Apr. 21, 1885 | E. Weston | Electro Magnetic Motor | DC motors |
| 324,667 | Aug. 18, 1885 | P. Diehl | Electric motor | DC 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 |
| 336,780 | Feb. 23, 1886 | R.E. Ball | Dynamo Electric Machine | motor regulators |
| 356,834 | Feb. 01, 1887 | W.W. Griscom | Electric motor | DC motors |
| 403,630 | May 21, 1889 | T.L. Wilson | Dynamo Electric Machine | DC motors |
