Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5994012 | Naphthoquinone derivative and electrophotosensitive material using same | Yukimasa Watanabe, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai, Atsushi Fujii +7 more | 1999-11-30 |
| 5863688 | Naphthoquinone derivative | Yukimasa Watanabe, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai, Atsushi Fujii +7 more | 1999-01-26 |
| 5773613 | Tryptoanthrinimine derivative and electrophotosensitive material using the same | Hirofumi Kawaguchi, Nobuko Akiba, Yukimasa Watanabe, Hiroaki Iwasaki, Yasuyuki Hanatani +7 more | 1998-06-30 |
| 5550290 | Benzidine derivative and electrophotosensitive material using the same | Yasufumi Mizuta, Masashi Tanaka, Nariaki Muto, Toshiyuki Fukami, Hideo Nakamori +4 more | 1996-08-27 |
| 5514508 | Electrophotosensitive material | Toshiyuki Fukami, Hideo Nakamori, Hiroshi Shiomi, Hirofumi Kawaguchi, Hisakazu Uegaito +4 more | 1996-05-07 |
| 5494765 | Electrophotosensitive material using a phenylenediamine derivative | Toshiyuki Fukami, Hideo Nakamori, Keisuke Sumida | 1996-02-27 |