Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6479671 | Process for producing optically active chromene derivative | Toshiro Konoike, Shoji Shinomoto, Yutaka Ide, Takashi Ohya, Ken-ichi Matsumura | 2002-11-12 |
| 6218427 | Chromene-3-carboxylate derivatives | Natsuki Ishizuka, Ken-ichi Matsumura, Katsunori Sakai, Toshiro Konoike, Seijiro Hara +1 more | 2001-04-17 |