Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4961016 | Dual-face cooling fan for a dynamoelectric machine | Melvin H. Hallmann, Robert W. Ward | 1990-10-02 |
| 4821770 | Solenoid valve assembly | Richard M. Parrott, William J. Ricketts | 1989-04-18 |
| 4727279 | Piezoelectric knock sensor | — | 1988-02-23 |
| 4371804 | Piezoelectric knock sensor | Gerald O. Huntzinger, Melvin H. Hallmann | 1983-02-01 |