Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7261845 | Plastic lens and process for preparing the lens | Shinsuke Itoh | 2007-08-28 |
| 7101953 | Process for producing plastic lens and plastic lens | — | 2006-09-05 |
| 7091301 | Plastic lenses for spectacles | — | 2006-08-15 |
| 7009025 | Optical materials having good ultraviolet absorbability and method for producing them | — | 2006-03-07 |
| 7001974 | Process for producing plastic lens and plastic lens | — | 2006-02-21 |
| 6743886 | Plastic lenses for spectacles | — | 2004-06-01 |
| 6673888 | Optical materials having good ultraviolet absorbability and method for producing them | — | 2004-01-06 |
| 6448304 | Optical materials having good ultraviolet absorbability and method for producing them | Shinsuke Itoh | 2002-09-10 |
| 6441119 | Optical materials having good ultraviolet absorbability and method for producing them | — | 2002-08-27 |
| 6274694 | Process for the production of polyurethane lens | Yukio Kageyama | 2001-08-14 |
| 5961889 | Process of producing polythiol oligomer | Jian Jiang | 1999-10-05 |
| 5744568 | Process for the production of polyurethane lens | Yukio Kageyama | 1998-04-28 |
| 5635580 | Process for the production of polyurethane lens | Yukio Kageyama | 1997-06-03 |
| 5294666 | Polymer for optical products and process for preparation thereof | Reisuke Okada, Tsuyoshi Ohkubo | 1994-03-15 |
| 5181141 | Anti-reflection optical element | Koji Sato, Tokio Suzuki, Hajime Kamiya, Kimio Nakamura, Tetsuo Ohsora | 1993-01-19 |
| 4975328 | Process for producing polyurethane lens | Yoshiro Hirose, Takeshi Sakamoto, Mitsuo Sugimura, Kazuo Inoue, Eiichi Yajima +1 more | 1990-12-04 |