Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4470338 | Self oscillating vacuum actuator | Kenneth H. Clayton, Melvin H. Hallmann, Gerald O. Huntzinger | 1984-09-11 |
| 4300890 | Automatic tension control mechanism for a drive belt | Melvin H. Hallmann | 1981-11-17 |