Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874728 | Organophilic clay modified with silane compounds | Donald R. Eilliott | 1989-10-17 |
| 4861584 | Allergen absorbent and blocking aerosol composition | Thomas W Powell, Anthony A. Schulz | 1989-08-29 |