Issued Patents 1989
Showing 1–2 of 2 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, Manabu Hori, Hiroshi Ohtaka, Takayuki Sukamoto, Hideaki Hara | 1989-10-31 |
| 4797400 | Piperazine compounds and anti-ulcer composition containing the same | Hiroshi Ohtaka, Kenji Yoshida, Kenji Suzuki, Koichi Shimohara, Sigeru Tajima | 1989-01-10 |