Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6409773 | Coupler for use in oxidative hair dyeing | Yuh-Guo Pan, Margaret Popp | 2002-06-25 |
| 6342079 | Primary intermediate for use in oxidative hair dyeing | Yuh-Guo Pan, Linas R. Stasaitis | 2002-01-29 |