Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7261844 | Photochromic contact lens having excellent discoloring characteristic | Naotaka Kamiya, Shigeyasu Nagai | 2007-08-28 |
| 6770727 | Process for preparing urethane compound for medical instruments | Tsuyoshi Watanabe, Eri Ito, Shoji Ichinohe, Toshio Yamazaki | 2004-08-03 |
| 6770728 | Process for preparing ocular lens with urethane compound and process for preparing urethane compound for medical instruments | Tsuyoshi Watanabe, Eri Ito, Shoji Ichinohe, Toshio Yamazaki, Mouad Lamrani | 2004-08-03 |
| 6544953 | Ophthalmic composition | Akira Tsuzuki | 2003-04-08 |
| 6495651 | Process for preparing urethane compound for medical instruments | Tsuyoshi Watanabe, Eri Ito, Shoji Ichinohe, Toshio Yamazaki | 2002-12-17 |
| 6417144 | Solution for contact lenses | Akira Tsuzuki | 2002-07-09 |
| 5919742 | Contact lens cleaning material formed of a polymer | Akira Tsuzuki | 1999-07-06 |
| 5777032 | Ocular lens and a method for its production | Yasuhiro Yokoyama, Yuriko Watanabe, Shoji Ichinohe, Toshio Yamazaki | 1998-07-07 |