Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4487615 | Method of reducing mine dust | Larry D. Taylor, David M. Miller | 1984-12-11 |
| 4483238 | Dust control in longwall mining | — | 1984-11-20 |
| 4388974 | Variable diameter drill rod stabilizer | Emrys Jones | 1983-06-21 |
| 4303274 | Degasification of coal seams | — | 1981-12-01 |
| 4247312 | Drilling fluid circulation system | Charles E. Mason, Stephen D. Lauer, Emrys Jones | 1981-01-27 |