Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864969 | Pressurized fluid bed hot gas depressurization system | Dennis K. McDonald, Paul S. Weitzel | 1989-09-12 |
| 4848452 | Tube bundle support device | Dennis K. McDonald | 1989-07-18 |