Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6809114 | 4-aminobenzopyran derivatives | Yoshio Ohara, Kazuhiko Ohrai, Kazufumi Yanagihara, Yukihiro Shigeta, Toru Tsukagoshi | 2004-10-26 |
| 6677371 | 4-oxybenzopyran derivative | Keizo Tanikawa, Kazuhiko Ohrai, Kazufumi Yanagihara, Yukihiro Shigeta, Toru Tsukagoshi | 2004-01-13 |