Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888354 | Skin penetration enhancement using free base and acid addition salt combinations of active agents | Yunik Chang | 1989-12-19 |
| 4863970 | Penetration enhancement with binary system of oleic acid, oleins, and oleyl alcohol with lower alcohols | Yunik Chang | 1989-09-05 |
| 4855294 | Method for reducing skin irritation associated with drug/penetration enhancer compositions | Charles D. Ebert | 1989-08-08 |
| 4849224 | Device for administering an active agent to the skin or mucosa | Yunik Chang, Charles D. Ebert | 1989-07-18 |