Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9298112 | Method of manufacturing positively-charged single-layer electrophotographic photoreceptor, positively-charged single-layer electrophotographic photoreceptor, and image forming apparatus | Sakae Saito, Kazunari Hamasaki, Keizo Kimoto, Syoji Itsumi, Hiroshi Takemoto | 2016-03-29 |
| 9285692 | Positively-charged single-layer electrophotographic photoreceptor and image forming apparatus | Kazunari Hamasaki, Keizo Kimoto | 2016-03-15 |
| 9217981 | Positively-charged single-layer electrophotographic photoreceptor and image forming apparatus | Keizo Kimoto, Sakae Saito, Kazunari Hamasaki, Syoji Itsumi, Hiroshi Takemoto | 2015-12-22 |
| 7555241 | Image forming device using a single-layer-type electrophotographic photoconductor and image forming method using the same | Makoto Shishido, Shiho Okawa, Eiichi Miyamoto | 2009-06-30 |
| 6174638 | Naphthalenetetracarboxylic acid diimide derivatives and photosensitive materials for electrophotography | Kou Ishigami, Fumio Sugai | 2001-01-16 |
| 6127076 | Naphthalenetetracarboxylic acid diimide derivatives and photosensitive material for electrophotography | Kou Ishigami, Fumio Sugai | 2000-10-03 |
| 5994012 | Naphthoquinone derivative and electrophotosensitive material using same | Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai +7 more | 1999-11-30 |
| 5863688 | Naphthoquinone derivative | Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai +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 |
| 5705694 | Trinitrofluoroenonimine derivative and electrophotosensitive material using the same | Hirofumi Kawaguchi, Syunichi Matsumoto, Nobuko Akiba, Toshiyuki Fukami, Ichiro Yamazato +2 more | 1998-01-06 |
| 5616441 | Tryptoanthorine derivative contained in electrophotosensitive material | Hirofumi Kawaguchi, Syunichi Matsumoto, Nobuko Akiba, Toshiyuki Fukami, Ichiro Yamazato +2 more | 1997-04-01 |
| 5550290 | Benzidine derivative and electrophotosensitive material using the same | Masashi Tanaka, Nariaki Muto, Toshiyuki Fukami, Hideo Nakamori, Mikio Kakui +4 more | 1996-08-27 |
| 5424157 | Electrophotosensitive material containing disazo compound as charge-generating agent | Eiichi Miyamoto | 1995-06-13 |
| 5336576 | Electrophotographic photosensitive member having a photosensitive layer comprising the azo compound | Eiichi Miyamoto, Yasuyuki Hanatani, Hiroaki Iwasaki, Akihiko Kawahara | 1994-08-09 |
| 5288576 | Electrophotographic member having an azo compound with diphenoquinone | Eiichi Miyamoto, Yasuyuki Hanatani, Hiroaki Iwasaki, Akihiko Kawahara | 1994-02-22 |
| 5274084 | Bisazo compounds which contain a diphenoquinone tetraazo component and an electrophotographic photosensitive member having a photosensitive layer comprising the bisazo compound | Eiichi Miyamoto, Yasuyuki Hanatani, Hiroaki Iwasaki, Akihiko Kawahara | 1993-12-28 |
| 5260157 | Electrophotographic photosensitive element comprising a surface protective layer comprising an etherified melamine-formaldehyde resin | Akihiko Kawahara, Kaname Nakatani, Nariaki Tanaka | 1993-11-09 |
| 5185228 | Electrophotosensitive material containing p-benzylbiphenyl | Tatsuo Maeda, Masato Katsukawa, Hiroaki Iwasaki | 1993-02-09 |
| 5135834 | Electrophotographic polyvinyl acetal layer containing element and process of producing | Yasuyuki Hanatani, Kaname Nakatani | 1992-08-04 |
| 5063126 | Electrophotographic photosensitive material | Kaname Nakatani, Yasuyuki Hanatani | 1991-11-05 |