Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829126 | High water-absorptive soft contact lens | Tatsutoshi Nakajima, Nobuyuki Toyoshima | 1989-05-09 |
| 4547543 | Water-absorptive contact lenses | Takanori Shibata, Hiroyuki Kako | 1985-10-15 |