Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857149 | Method and products for sizing paper and similar materials | Jerome M. Gess | 1989-08-15 |
| 4828890 | Method for increasing bleed resistance of preserved plants and products of the method | David W. Park, Robert H. Young | 1989-05-09 |