Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4402793 | Multiple effect thin film distillation system and process | John P. Petrek | 1983-09-06 |
| 4329204 | Multiple effect thin film distillation system | John P. Petrek | 1982-05-11 |