Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9045699 | Hydrocarbonaceous material upgrading method | Lee E. Brecher, FRANK DAVID GUFFEY | 2015-06-02 |
| 6817411 | System for displacement of water in coalbed gas reservoirs | — | 2004-11-16 |
| 6450256 | Enhanced coalbed gas production system | — | 2002-09-17 |
| 6244338 | System for improving coalbed gas production | — | 2001-06-12 |