Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873172 | Process for forming a superhigh contrast negative image | Shoji Ishiguro, Shigeo Hirano, Tadao Shishido | 1989-10-10 |
| 4864022 | 3-Condensed imidazolium-cephem compounds | Masahiro Kondo, Masahiko Fujino | 1989-09-05 |
| 4839351 | Antibacterial compounds, and use | Tatsuo Nishimura, Yoshinobu Yoshimura, Naoto Hashimoto | 1989-06-13 |
| 4822818 | Bicycle compounds, their production and use | Yoshikazu Oka, Kohei Nishikawa | 1989-04-18 |
| 4797395 | 1-Acyloxyalkyl esters of cephalosporin | Yoshinobu Yoshimura, Mitsuo Numata | 1989-01-10 |