Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5708049 | Colored contact lens and method for producing the same | Hiroshi Katagiri, Youichi Ushiyama | 1998-01-13 |
| 5520910 | Antimicrobial polymer, contact lens and contact lens-care articles | Kazukichi Hashimoto, Yoshiko Inaba, Seiji Shimura, Takao Mogami, Yoichi Ushiyama | 1996-05-28 |