Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8528989 | Method for simultaneously mining vertically disposed beds | Duane S. Halverson | 2013-09-10 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8528989 | Method for simultaneously mining vertically disposed beds | Duane S. Halverson | 2013-09-10 |