Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877803 | Bis-dioxopiperazine derivatives and pharmaceutical compositions containing the same | Muneaki Takase | 1989-10-31 |
| 4868303 | Bis-dioxopiperazine derivatives | Muneaki Takase | 1989-09-19 |