Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4710064 | Movable roof support and bolter system | Frank K. Stafford | 1987-12-01 |
| 4676697 | Movable roof support and bolter system | Frank K. Stafford | 1987-06-30 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4710064 | Movable roof support and bolter system | Frank K. Stafford | 1987-12-01 |
| 4676697 | Movable roof support and bolter system | Frank K. Stafford | 1987-06-30 |