Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7261844 | Photochromic contact lens having excellent discoloring characteristic | Sadayasu Tanikawa, Shigeyasu Nagai | 2007-08-28 |
| 5741830 | Water-absorptive soft contact lens | Miyuki Kamiya, Noriko Iwata, Yasushi Yamamoto, Yasuo Tarumi | 1998-04-21 |
| 5041511 | Ocular lens material | Hiroaki Yanagawa | 1991-08-20 |