Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5817810 | Tryptanthrine compounds | Fumio Sugai, Nobuko Akiba, Yukimasa Watanabe, Hirofumi Kawaguchi, Sakae Saitoh | 1998-10-06 |
| 5773613 | Tryptoanthrinimine derivative and electrophotosensitive material using the same | Hirofumi Kawaguchi, Nobuko Akiba, Yukimasa Watanabe, Hiroaki Iwasaki, Yasuyuki Hanatani +7 more | 1998-06-30 |
| 5753394 | Trinitrofluorenonimine derivative and electrophotosensitive material using the same | Hirofumi Kawaguchi | 1998-05-19 |
| 5705694 | Trinitrofluoroenonimine derivative and electrophotosensitive material using the same | Hirofumi Kawaguchi, Yasufumi Mizuta, Nobuko Akiba, Toshiyuki Fukami, Ichiro Yamazato +2 more | 1998-01-06 |
| 5616441 | Tryptoanthorine derivative contained in electrophotosensitive material | Hirofumi Kawaguchi, Yasufumi Mizuta, Nobuko Akiba, Toshiyuki Fukami, Ichiro Yamazato +2 more | 1997-04-01 |