Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7832475 | Biogenic methane production enhancement systems | Song Jin, Alan E. Bland | 2010-11-16 |
| 7597505 | Roof bolt plate | David R. Marr, Jr. | 2009-10-06 |
| 7510351 | Method for supporting a subsurface material | David R. Marr, Jr. | 2009-03-31 |
| 4268088 | Shortwall mining of trona | Glen E. Hunter | 1981-05-19 |