Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693830 | Process for preparing the spiropyrone compounds | Junji Momoda, Satoshi Imura | 1997-12-02 |
| 5683628 | Photochromic composition and photochromic resin obtainable by using the same | Hitoshi Mizuno, Satoshi Kubota, Tooru Saito, Toshiyuki Miyabayashi | 1997-11-04 |
| 5631382 | Fulgimide compound | Tsuneyoshi Tanizawa | 1997-05-20 |
| 5621017 | Photochromic composition and method producing photochromic cured product | Junji Momoda | 1997-04-15 |