Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853468 | Process for the preparation of cephem derivatives | Sigeru Torii, Kenji Uneyama, Hideo Tanaka, Michio Sasaoka, Norio Saito +1 more | 1989-08-01 |
| 4810788 | Azetidinone disulfide derivatives and a process for preparing the same | Sigeru Torii, Hideo Tanaka, Michio Sasaoka, Norio Saito, Takashi Siroi | 1989-03-07 |
| 4801720 | Azetidinone disulfides and a ring opening process for preparing the same | Sigeru Torii, Hideo Tanaka, Michio Sasaoka, Norio Saito, Takashi Siroi | 1989-01-31 |