Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6447118 | Optical water-absorptive gel and ophthalmic material using the same | Kazuhiko Nakada | 2002-09-10 |
| 6329445 | Ocular lens material | Kazuhiko Nakada, Akinori Okumura | 2001-12-11 |