Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877873 | Syn-isomer of 3,7-disubstituted-3-cephem-4-carboxylic acid compounds and processes for the preparation thereof | Takao Takaya, Hisashi Takasugi, Hiromu Kochi | 1989-10-31 |
| 4871860 | Syn-isomer of 3,7-disubstituted-3-cephem-4-caroxylic acid compounds and processes for the preparation thereof | Takao Takaya, Hisashi Takasugi, Hiromu Kochi | 1989-10-03 |
| 4804752 | Syn-isomer of 3,7-disubstituted-3-cephem-4-carboxylic acid compounds and processes for the preparation thereof | Takao Takaya, Hisashi Takasugi, Hiromu Kochi | 1989-02-14 |