| All Patents in class 310/230 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 264,982 | Sep. 26, 1882 | E. Weston | Electro Magnetic Motor |
 | 393,266 | Nov. 20, 1888 | A.L. Riker | Electric motor and dynamo |
| | 792,762 | Jun. 20, 1905 | G.S. Dunn | Dynamo Electric Machine |
| | 1,043,325 | Nov. 05, 1912 | J.C. Lincoln | Variable Speed Electric Motor |
| | 1,983,718 | Dec. 11, 1934 | W.L. Nies, H.C. Walter | Electric Power Generating Machine |
| | 1,990,767 | Feb. 12, 1935 | H.B. Walter, W.B. Whitsitt | Reversing Brush Means for Electric Generators |
| | 3,440,465 | Apr. 22, 1969 | L.C. Pratt, J.R. Provost, Jr., J.A. De Carteret | Reversing mechanism for electric motors |
