Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861768 | 2 .beta.-substituted thiomethylpenicillin derivatives and their preparation and use | Sigeru Torii, Hideo Tanaka, Motoaki Tanaka, Shozo Yamada, Hisashi Ohbayashi | 1989-08-29 |