Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883868 | 7-amino-3-(substituted isoindolinium)methyl-3-cephem derivatives | Ryosuke Ushijima, Fumio Nakano, Koji Yamada, Eiichi Mano | 1989-11-28 |
| 4880797 | Cephalosporin derivatives and antibacterial agents | Ryuji Mitomo, Ryosuke Ushijima | 1989-11-14 |
| 4814328 | Cephalosporin derivatives, and antibacterial agents | Norikazu Otake, Ryosuke Ushizima | 1989-03-21 |