Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4470338 | Self oscillating vacuum actuator | Melvin H. Hallmann, Gerald O. Huntzinger, Burr E. Stephens | 1984-09-11 |
| 4298342 | Automatic belt tensioner | Charles D. Denniston, Donald G. Guetersloh, Melvin H. Hallmann | 1981-11-03 |