| All Patents in class 310/220 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 269,605 | Dec. 26, 1882 | E. Thomson | Dynamo Electric Machine | electric motors |
| 324,891 | Aug. 25, 1885 | F.J. Sprague | Electric Dynamic Motor | DC motors |
| 562,366 | Jun. 23, 1896 | E. Arnold | Electric motor and dynamo | electric motors |
| 567,119 | Sep. 01, 1896 | R. Eickemeyer | Electric motor | |
| 597,418 | Jan. 18, 1898 | F.A. Johnson | Regulation of dynamo-electric machinery | electric motors |
| 664,733 | Dec. 25, 1900 | R. Eickemeyer | Method of converting the energy of alternating electric currents into effective mechanical energy | |
| 666,315 | Jan. 22, 1901 | F.A. Johnson | Method of Construction of Electric Motors | electric motors |
| 712,257 | Oct. 28, 1902 | J. Burke | Armature for dynamo-electric machines | motor armatures |
| 828,077 | Aug. 07, 1906 | H. Weichsel | Method of commutating alternating-current electric motors | AC motors |
| 900,555 | Oct. 06, 1908 | B.G. Lamme | Controlling System for Electric Motors | motor controls |
| 1,115,947 | Nov. 03, 1914 | J.C. Lincoln | Dynamo-electric-machine structure | electric motors |
| 1,194,645 | Aug. 15, 1916 | J.C. Lincoln | Variable Speed Electric Motor | DC motors |
| 1,614,093 | Jan. 11, 1927 | H. Weichsel | Alternating-current motor | AC motors |
| 1,691,747 | Nov. 13, 1928 | H. Weichsel, B. McCormick | Alternating-current motor | AC motors |
