Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693738 | Composition for urethane-base plastic lens, urethane-base plastic lens obtained from the composition, and process for the production of the plastic lens | Koju Okazaki, Chitoshi Shimakawa, Mamoru Tanaka, Yoshinobu Kanemura, Teruyuki Nagata +3 more | 1997-12-02 |
| 5652321 | Composition for optical materials and use thereof | Nobuya Kawauchi, Seiichi Kobayashi | 1997-07-29 |
| 5594088 | Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared thereby | Teruyuki Nagata, Koju Okazaki, Tohru Miura, Nobuyuki Kajimoto, Yoshinobu Kanemura +1 more | 1997-01-14 |