Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877790 | Quinazoline derivative, processes for its production, and cerebral dysfunction remedying agent comprising it as active ingredient | Ryuichi Iemura, Hiroshi Ohtaka, Takayuki Sukamoto, Hideaki Hara, Keizo Ito | 1989-10-31 |