Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5391591 | Oxygen permeable hard contact lens materials comprising a fluoroalkyl(silicon-containing alkyl) fumarate copolymer | Toru Kawaguchi, Ichiro Ando, Yasushi Yamamoto, Hiroshi Yoshioka, Toshio Yamazaki | 1995-02-21 |
| 5250583 | Ocular lens material | Toru Kawaguchi, Ichiro Ando, Yasushi Yamamoto, Hiroshi Yoshioka, Toshio Yamazaki | 1993-10-05 |
| 4954586 | Soft ocular lens material | Takanori Shibata, Atsushi Hirashima, Ichiro Ando, Noriko Iwata, Hiroshi Yoshioka +2 more | 1990-09-04 |
| 4920180 | Highly water-absorptive ocular lens material | Takanori Shibata, Atsushi Hirashima | 1990-04-24 |
| 4829126 | High water-absorptive soft contact lens | Tatsutoshi Nakajima, Masashige Yamanaka | 1989-05-09 |
| 4745158 | Highly water-absorptive optical material | Tatsutoshi Nakashima, Yasuomi Sasai | 1988-05-17 |
| 4451629 | Contact lens and process for preparing the same | Kyoichi Tanaka, Shinji Kanome, Tatsutoshi Nakajima, Kazuhiko Nakada | 1984-05-29 |