Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4480222 | Adjustable electrical shunt | Richard W. Mattson | 1984-10-30 |
| 4354466 | Idle speed controller | William J. Roberts | 1982-10-19 |
| 4334188 | Voltage detector using an oscillator and comparator means | — | 1982-06-08 |
| 4316186 | Brush wear detection and warning system | James A. Purdy | 1982-02-16 |