Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6802993 | Curable composition comprising a photochromic compound | Toshiaki Otani | 2004-10-12 |
| 6723859 | Chromene compound | Yuichiro Kawabata, Yasuko Takeda, Hironobu Nagoh, Shinobu Izumi | 2004-04-20 |
| 6719926 | Chromene compound | Shingo Matsuoka, Hironobu Nagou | 2004-04-13 |
| 6698883 | Curable composition and photochromic cured article | Hironobu Nagou, Toshiaki Otani | 2004-03-02 |