Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873835 | Process for the simultaneous exchange of heat and matter through a porous wall | Alain Grehier | 1989-10-17 |
| 4822948 | Self-cooled process for extracting heavy hydrocarbon fractions | Joseph Larue | 1989-04-18 |