Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6187493 | Electrophotosensitive material | Masato Katsukawa, Akiyoshi Urano, Ayako Sugase, Mitsuo Ihara, Yuka Nakamura | 2001-02-13 |
| 5994012 | Naphthoquinone derivative and electrophotosensitive material using same | Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai +7 more | 1999-11-30 |
| 5914208 | Electrophotographic photosensitive material | Toshiyuki Fukami, Nariaki Tanaka, Eiichi Miyamoto, Tohru Ueno, Hiroshi Mishima | 1999-06-22 |
| 5863688 | Naphthoquinone derivative | Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai +7 more | 1999-01-26 |
| 5780194 | Electrophotosensitive material | Masato Katsukawa, Akiyoshi Urano, Ayako Sugase, Mitsuo Ihara, Yuka Nakamura | 1998-07-14 |
| 5773613 | Tryptoanthrinimine derivative and electrophotosensitive material using the same | Hirofumi Kawaguchi, Nobuko Akiba, Yukimasa Watanabe, Hiroaki Iwasaki, Yasuyuki Hanatani +7 more | 1998-06-30 |
| 5750308 | Electrophotographic developing method using developing bias voltage based on light decay characteristics of photosensitive material | Mitsuji Tsujita, Nariaki Tanaka, Takashi Terada, Takuji Terada, Eiichi Miyamoto | 1998-05-12 |
| 5705694 | Trinitrofluoroenonimine derivative and electrophotosensitive material using the same | Hirofumi Kawaguchi, Yasufumi Mizuta, Syunichi Matsumoto, Nobuko Akiba, Toshiyuki Fukami +2 more | 1998-01-06 |
| 5629117 | Electrophotosensitive material | Masato Katsukawa, Masashi Tanaka, Yuka Nakamura | 1997-05-13 |
| 5616441 | Tryptoanthorine derivative contained in electrophotosensitive material | Hirofumi Kawaguchi, Yasufumi Mizuta, Syunichi Matsumoto, Nobuko Akiba, Toshiyuki Fukami +2 more | 1997-04-01 |
| 5530524 | Electrophotographic apparatus with photosensitive drum requiring multiple rotations for production of a copy image on one sheet and method of operating same | Mitsuji Tsujita, Keizo Kimoto, Nariaki Tanaka, Tomoki Tanaka | 1996-06-25 |