Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804494 | Wood preservative compositions and a process for their production | Ian K. Egerton | 1989-02-14 |
| 4797281 | Process for preparing wood preservative compositions | Ian K. Egerton | 1989-01-10 |