Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4996312 | Porphyrin derivatives, and their production and use | Isao Sakata, Susumu Nakajima, Koichi Koshimizu, Natsuki Samejima, Hiroyuki Takata +3 more | 1991-02-26 |
| 4849207 | Porphyrin derivatives | Isao Sakata, Susumu Nakajima, Koichi Koshimizu, Natsuki Samejima, Hiroyuki Takata +3 more | 1989-07-18 |
| 4709022 | Pheophorbide derivatives and alkaline salts thereof | Isao Sakata, Susumu Nakajima, Koichi Koshimuzi, Natsuki Samejima, Hiroyuki Takata | 1987-11-24 |
| 4604241 | 9-desoxo-9-hydroxy-pheophorbide derivatives and alkaline salts thereof | Isao Sakata, Susumu Nakajima, Koichi Koshimizu, Natsuki Samejima, Hiroyuki Takata | 1986-08-05 |