Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870207 | Synthesis of arphamenine A | Hamao Umezawa, Kuniaki Tatsuta, Takeshi Nakamura, Shunzo Fukatsu | 1989-09-26 |
| 4859593 | New physiologically active substance, arphamenine and production thereof | Hamao Umezawa, Tomio Takeuchi, Masa Hamada, Masaaki Ishizuka | 1989-08-22 |