Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4933444 | Process for preparing 2.beta.-substituted-methylpenicillin derivatives | Sigeru Torii, Hideo Tanaka, Motoaki Tanaka, Shozo Yamada, Akira Nakai | 1990-06-12 |
| 4891369 | 2.beta.-Substituted-methylpenicillanic acid derivatives, and salts and esters thereof | Sigeru Torii, Hideo Tanaka, Motoaki Tanaka, Shozo Yamada, Akira Nakai +1 more | 1990-01-02 |
| 4861768 | 2 .beta.-substituted thiomethylpenicillin derivatives and their preparation and use | Sigeru Torii, Hideo Tanaka, Motoaki Tanaka, Shozo Yamada, Akira Nakai | 1989-08-29 |