Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886807 | Novel pyrimidopyrimidine derivative, process for producing it and pharmaceutical composition | Akimoto Ohnishi | 1989-12-12 |
| 4808587 | 5-substituted pyrido[2,3-d]pyrimidine-2,4-diones | Kouichiro Go, Yoshiyuki Kurimoto | 1989-02-28 |
| 4808618 | Substituted 1,3-dialkylpyrido[4,3-d]pyrimidine-2,4-diones | Kouichiro Go, Yoshiyuki Kurimoto | 1989-02-28 |