Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703143 | Ocular lens material | Kazuhiko Nakada, Toshio Yamazaki, Shoji Ichinohe | 1997-12-30 |
| 5605942 | Contact lens material | Kazuhiko Nakada, Shoji Ichinohe, Toshio Yamazaki, Hideto Kato | 1997-02-25 |