Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6727336 | Ocular lens materials and process for producing the same | Eri Ito, Tetsuji Kawai, Sadanori Oono, Kazuhiko Nakada | 2004-04-27 |
| 5910518 | Oxygen permeable contact lens having high durable hydrophilic surface and method for producing the same | Kazuhiko Nakada, Naomi Saito, Atsuyuki Nakamura, Yasuhito Hishida | 1999-06-08 |
| 5708050 | Oxygen permeable contact lens having high durable hydrophilic surface and method for producing the same | Kazuhiko Nakada, Naomi Saito, Atsuyuki Nakamura, Yasuhito Hishida | 1998-01-13 |