Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824848 | Pyrazolo[3,4-d]pyrimidine derivatives, their production and use | Takehiko Naka, Yoshiyasu Furukawa | 1989-04-25 |
| 4804665 | Azaspiro compounds and their use | Giichi Goto | 1989-02-14 |