Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663162 | Cephem derivatives | Eijiro Umemura, Yuko Kano, Sohjiro Shiokawa, Toshiaki Kudo, Masaki Tsushima +3 more | 1997-09-02 |
| 5661144 | Cephem derivatives with 3-substituted bis heterocycles | Masaki Tsushima, Katsuyoshi Iwamatsu, Atsushi Tamura | 1997-08-26 |