Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5284943 | Tatraazaporphin, process for producing the same, as well as optical recording media using the same and production processes thereof | Seiji Tai, Koichi Kamijima, Mitsuo Katayose, Takayuki Akimoto, Hideo Hagiwara | 1994-02-08 |