| All Patents of Type: DC motors |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 132 | Feb. 25, 1837 | T. Davenport | Improvement in propelling machinery by magnetism and electro-magnetism | DC motors |
| 324,667 | Aug. 18, 1885 | P. Diehl | Electric Motor | DC motors |
| 539,277 | May 14, 1895 | J.C. Lincoln | Electric Motor | DC motors |
| 829,975 | Sep. 04, 1906 | J.C. Lincoln | Variable Speed Electric Motor | DC motors |
| 847,088 | Mar. 12, 1907 | J.C. Lincoln | Variable Speed Electric Motor | DC motors |
| 1,043,325 | Nov. 05, 1912 | J.C. Lincoln | Variable Speed Electric Motor | DC motors |
| 1,194,645 | Aug. 15, 1916 | J.C. Lincoln | Variable Speed Electric Motor | DC motors |
| 1,669,134 | May 08, 1928 | N.T. Kelso | Molded commutator | electric motor making |
