Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5768733 | Ramp securing device | — | 1998-06-23 |
| 4961387 | Universally adaptable, hinged hatch cover system for railroad hopper cars | James E. Head | 1990-10-09 |
| 4821648 | Hopper car cover | Dan E. Bramhall | 1989-04-18 |