Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832728 | Fertilizer compositions, processes of making them, and pocesses of using them | G. Graham Allan, George M. Crews | 1989-05-23 |
| 4812159 | Plant growth regulators derived from chitin | — | 1989-03-14 |