Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861768 | 2 .beta.-substituted thiomethylpenicillin derivatives and their preparation and use | Hideo Tanaka, Motoaki Tanaka, Shozo Yamada, Akira Nakai, Hisashi Ohbayashi | 1989-08-29 |
| 4853468 | Process for the preparation of cephem derivatives | Kenji Uneyama, Hideo Tanaka, Junzo Nokami, Michio Sasaoka, Norio Saito +1 more | 1989-08-01 |
| 4810788 | Azetidinone disulfide derivatives and a process for preparing the same | Hideo Tanaka, Junzo Nokami, Michio Sasaoka, Norio Saito, Takashi Siroi | 1989-03-07 |
| 4801720 | Azetidinone disulfides and a ring opening process for preparing the same | Hideo Tanaka, Junzo Nokami, Michio Sasaoka, Norio Saito, Takashi Siroi | 1989-01-31 |
| 4798890 | Process for preparation of azetidinone derivatives | Hideo Tanaka, Michio Sasaoka, Takashi Shiroi | 1989-01-17 |