Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872886 | Two-stage coal gasification process | John P. Henley, Bruce C. Peters, Larry L. LaFitte | 1989-10-10 |
| 4857076 | Annular nozzle | Douglas D. Merrick, William P. White, Charles W. Lipp | 1989-08-15 |