Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859461 | Coatable ion exchange resins | San-Laung Chow | 1989-08-22 |
| 4859462 | Polymer-treated ion exchange resins | San-Laung Chow | 1989-08-22 |
| 4847077 | Controlled release pharmaceutical preparations | — | 1989-07-11 |