Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9309255 | Process of a quaternary ammonium salt | Yuji Fujiwara | 2016-04-12 |
| 8921551 | Process of a quaternary ammonium salt | Yuji Fujiwara | 2014-12-30 |
| 8586737 | Process of a quaternary ammonium salt using phosphate | Yuji Fujiwara | 2013-11-19 |
| 6495587 | Tricyclic indole-2-carboxylic acid compound used as NMDA receptor antagonist | Seiji Katayama, Hisakazu Kishimoto, Ryu Nagata | 2002-12-17 |
| 5719152 | Tricyclic quinoxalinedione derivatives | Ryu Nagata, Norihiko Tanno, Toru Kodo, Hiroshi Yamaguchi | 1998-02-17 |
| 5496843 | Tricyclic indole-2-carboxylic acid derivatives | Ryu Nagata, Norihiko Tanno | 1996-03-05 |