Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698682 | Azo compounds and polarizing films using the compounds | Yoriaki Matsuzaki, Ryu Oi, Rihoko Imai, Keisuke Takuma | 1997-12-16 |
| 5695911 | Optical recording medium | Akio Karasawa, Kenichi Sugimoto, Takahisa Oguchi, Shin Aihara | 1997-12-09 |
| 5659039 | Quinophthalone compounds | Akira Ogiso, Rihoko Imai, Tsutami Misawa, Ryu Oi, Yoriaki Matsuzaki | 1997-08-19 |
| 5646273 | Phthalocyanine compound and optical recording medium containing it | Takahisa Oguchi, Hideki Umehara, Kenichi Sugimoto, Ryu Oi | 1997-07-08 |
| 5639809 | Azo compounds and polarizing films using the compounds | Yoriaki Matsuzaki, Ryu Oi, Rihoko Imai, Keisuke Takuma | 1997-06-17 |
| 5618868 | Polarizing film of a hydrophilic polymer film containing a novel azo compound | Tsutami Misawa, Akira Ogiso, Rihoko Imai | 1997-04-08 |