Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833222 | Crosslinker stabilizer for preparing absorbent polymers | Jonathan H. Siddall | 1989-05-23 |
| 4829820 | Visual indicator | Lenard W. Johnson | 1989-05-16 |
| 4799383 | Visual indicator | Lenard W. Johnson | 1989-01-24 |