Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5246989 | Photochromic compound, composition and use thereof | Takashi Tanaka, Satoshi Imura, Seiji Okazaki, Shinsuke Tanaka | 1993-09-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5246989 | Photochromic compound, composition and use thereof | Takashi Tanaka, Satoshi Imura, Seiji Okazaki, Shinsuke Tanaka | 1993-09-21 |