Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808210 | Herbicidal method of using 5-pyrazolones | Jean Tessier | 1989-02-28 |
| 4801717 | Hydroxylamine derivative of 5-nitro-8-hydroxy quinoline | Jean Tessier, Jean-Jacques Herve, Charles Van Assche | 1989-01-31 |