Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5080935 | Process for post-treatment of preservative-treated wood | Richard W. Hein | 1992-01-14 |
| 4779735 | Wood-preservative package | — | 1988-10-25 |
| 4649065 | Process for preserving wood | Richard W. Hein | 1987-03-10 |
| 4303705 | Treatment of wood with water-borne preservatives | — | 1981-12-01 |