| All Patents in class 322/80 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 287,511 | Oct. 30, 1883 | T.A. Edison | Electric Regulator |
 | 549,449 | Nov. 05, 1895 | M. von Dolivo-Dobrowolsky | Apparatus for indicating difference of phase |
 | 599,892 | Mar. 01, 1898 | W.H. Chapman | Electric regulator for dynamos |
 | 613,853 | Nov. 08, 1898 | W.H. Chapman | Electric regulators |
| | 680,798 | Aug. 20, 1901 | J.E. Miller | Mechanism for Generating Variable Electromotive Force |
 | 865,814 | Sep. 10, 1907 | W.H. Powell | Motor-control system |
 | 1,337,648 | Apr. 20, 1920 | V.A. Fynn | Synchronous alternating-current motor |
