Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863497 | Ozone-producing plant | Pierre Petit | 1989-09-05 |
| RE33026 | Process and device for vaporizing a liquid by heat exchange with a second fluid and their application in an air distillation installation | Pierre Petit, Jean-Francois Deschamps | 1989-08-22 |