Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814402 | Contact lens material | Yoshitaka Taniyama, Akihisa Sugiyama | 1989-03-21 |
| 4745158 | Highly water-absorptive optical material | Nobuyuki Toyoshima, Yasuomi Sasai | 1988-05-17 |