Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861768 | 2 .beta.-substituted thiomethylpenicillin derivatives and their preparation and use | Sigeru Torii, Hideo Tanaka, Shozo Yamada, Akira Nakai, Hisashi Ohbayashi | 1989-08-29 |
| 4840881 | Process for the production of light-sensitive silver halide photographic material | Yoshikazu Watanabe | 1989-06-20 |
| 4826959 | 2,2'-Azobis(2,4-dimethylvaleronitrile) isomer mixture predominant in low melting isomer and having high solubility | Tsutomu Miyagawa, Hideo Takeuchi | 1989-05-02 |