Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883669 | Transdermal absorption dosage unit for estradiol and other estrogenic steroids and process for administration | Yie W. Chien, Chia-Shun Lee, Kirti H. Valia | 1989-11-28 |
| 4818540 | Transdermal fertility control system and process | Yie W. Chien, Yih-Chain Huang | 1989-04-04 |