Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845257 | 4-halogeno-2-oxyimino-3-oxobutyric acids and derivatives | Yukio Ishibashi | 1989-07-04 |
| 4801703 | Method for production of cephalosporin compounds | Masayasu Kato, Kazuo Tsukamura | 1989-01-31 |