Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849092 | Process for regenerating a hydrocarbon hydroconversion catalyst | Pierre Ham, Didier Bischoff, Jean De Bonneville | 1989-07-18 |
| 4835746 | Device for producing soundwaves in water | — | 1989-05-30 |