Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6309568 | Process method optical thermoplastic urethane resin lens and the lens | Zhou Yang, Zhenya Zhu, Yin-Nian Lin, Tadashi Kobayashi | 2001-10-30 |
| 6179931 | Method for removing hard coat film from plastic lens | Tadashi Kobayashi, Shoji Kato | 2001-01-30 |
| 5922251 | Method of manufacturing plastic lenses | Tadashi Kobayashi, Shoji Kato | 1999-07-13 |