Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663162 | Cephem derivatives | Kunio Atsumi, Eijiro Umemura, Yuko Kano, Sohjiro Shiokawa, Toshiaki Kudo +3 more | 1997-09-02 |
| 5661144 | Cephem derivatives with 3-substituted bis heterocycles | Kunio Atsumi, Katsuyoshi Iwamatsu, Atsushi Tamura | 1997-08-26 |
| 5607927 | Cephalosporin derivative | Katsuyoshi Iwamatsu, Atsushi Tamura, Seiji Shibahara | 1997-03-04 |