Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6803471 | Indolinospiropyran compounds and methods for their manufacture | Weili Zhao | 2004-10-12 |
| 6747145 | Photochromic bis-naphthopyran compounds and methods for their manufacture | Weili Zhao | 2004-06-08 |
| 6720420 | Photochromic oxazine compounds and methods for their manufacture | Weili Zhao | 2004-04-13 |
| 6686466 | Photochromic oxazine compounds and methods for their manufacture | Weili Zhao | 2004-02-03 |