| All Patents in class 310/220 |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
 | 269,605 | Dec. 26, 1882 | E. Thomson | Dynamo Electric Machine |
| | 324,891 | Aug. 25, 1885 | F.J. Sprague | Electric Dynamic Motor |
 | 562,366 | Jun. 23, 1896 | E. Arnold | Electric motor and dynamo |
| | 567,119 | Sep. 01, 1896 | R. Eickemeyer | Electric motor |
 | 597,418 | Jan. 18, 1898 | F.A. Johnson | Regulation of dynamo-electric machinery |
| | 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 |
 | 712,257 | Oct. 28, 1902 | J. Burke | Armature for dynamo-electric machines |
| | 828,077 | Aug. 07, 1906 | H. Weichsel | Method of commutating alternating-current electric motors |
| | 900,555 | Oct. 06, 1908 | B.G. Lamme | Controlling System for Electric Motors |
