| All Patents in class 310/230 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 264,982 | Sep. 26, 1882 | E. Weston | Electro Magnetic Motor | DC motors |
| 792,762 | Jun. 20, 1905 | G.S. Dunn | Dynamo Electric Machine | DC motors |
| 1,043,325 | Nov. 05, 1912 | J.C. Lincoln | Variable Speed Electric Motor | DC motors |
| 1,983,718 | Dec. 11, 1934 | W.L. Nies, H.C. Walter | Electric Power Generating Machine | electric generators |
| 1,990,767 | Feb. 12, 1935 | H.B. Walter, W.B. Whitsitt | Reversing Brush Means for Electric Generators | electric generators |
| 3,440,465 | Apr. 22, 1969 | L.C. Pratt, J.R. Provost, Jr., J.A. De Carteret | Reversing mechanism for electric motors | handheld power tools |
