Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5997100 | Inertization system for highwall mining | Geoffrey R. Rigby | 1999-12-07 |
| 5820223 | Inertization system for highwall mining | Geoffrey R. Rigby | 1998-10-13 |
| 5609397 | Highwall mining system with driven conveyor units | Rene Abela, Henry J. Bartosiewicz | 1997-03-11 |