| All Patents in class 310/235 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 1,195,861 | Aug. 22, 1916 | E.F. Smith | Manufacture and construction of commutators |
| | 1,255,681 | Feb. 05, 1918 | C.C. Zenk | Commutator |
 | 1,284,362 | Nov. 12, 1918 | W.H. Kempton | Molded commutator-cylinder |
 | 1,284,524 | Nov. 12, 1918 | C.E. Wilson, W.H. Kempton, A.J. Bastian | Molded commutator-cylinder |
| | 1,360,165 | Nov. 23, 1920 | C.C. Zenk | Method for making commutators |
| | 1,360,166 | Nov. 23, 1920 | C.C. Zenk | Commutator |
| | 1,369,408 | Feb. 22, 1921 | F. Diehl | Commutator and commutator-bar |
 | 1,669,134 | May 08, 1928 | N.T. Kelso | Molded commutator |
| | 3,471,731 | Oct. 07, 1969 | R.M. Pierce, L.C. Pratt | Armature |
