Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9976403 | Method for shortening an injection pipe for underground coal gasification | Burl Edward Davis | 2018-05-22 |
| 9428978 | Method for shortening an injection pipe for underground coal gasification | Burl Edward Davis | 2016-08-30 |