Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883117 | Swirl flow heat exchanger with reverse spiral configuration | Bradley Dobbs, David B. Wigmore | 1989-11-28 |
| 4880055 | Impingement plate type heat exchanger | Dam C. Nguyen | 1989-11-14 |