Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4303127 | Multistage clean-up of product gas from underground coal gasification | John Freel, John C. Montagna | 1981-12-01 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4303127 | Multistage clean-up of product gas from underground coal gasification | John Freel, John C. Montagna | 1981-12-01 |