Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4518282 | Mine roof bearing plate with embossed area having conical and cylindrical sections | Earl W. Powers | 1985-05-21 |
| 4371293 | Mine roof bearing plate | Earl W. Powers | 1983-02-01 |
| 4200326 | Reinforced railway wheels and axles | — | 1980-04-29 |