Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860824 | Heat exchange element | Ronald L. Piuze, Ralph I. Larson, George A. Doumani | 1989-08-29 |
| 4840225 | Heat exchange element and enclosure incorporating same | Ronald L. Piuze, Ralph I. Larson, George A. Doumani | 1989-06-20 |