Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8420568 | Color-developing compositions and recording material containing same | Satoshi Kodama, Hiroshi Fujii, Tadashi Kawakami, Toshio Aihara | 2013-04-16 |
| 6243347 | Auto-loading disk player | Kazushige Kawana, Seiji Kato, Takehiro Takada | 2001-06-05 |
| 5994012 | Naphthoquinone derivative and electrophotosensitive material using same | Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai +7 more | 1999-11-30 |
| 5983056 | Photosensitive drum and image processing unit | Tetsuro Tomoe, Yoshifumi Okauchi, Yuji Tanaka, Tohru Ueno, Hiroshi Mishima | 1999-11-09 |
| 5914208 | Electrophotographic photosensitive material | Nariaki Tanaka, Ichiro Yamazato, 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 |
| 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, Yasufumi Mizuta, Syunichi Matsumoto, Nobuko Akiba, Ichiro Yamazato +2 more | 1998-01-06 |
| 5616441 | Tryptoanthorine derivative contained in electrophotosensitive material | Hirofumi Kawaguchi, Yasufumi Mizuta, Syunichi Matsumoto, Nobuko Akiba, Ichiro Yamazato +2 more | 1997-04-01 |
| 5600422 | Image-forming apparatus employing a reversal developing system | Masashi Tanaka, Masato Katsukawa, Hideo Nakamori | 1997-02-04 |
| 5550290 | Benzidine derivative and electrophotosensitive material using the same | Yasufumi Mizuta, Masashi Tanaka, Nariaki Muto, Hideo Nakamori, Mikio Kakui +4 more | 1996-08-27 |
| 5548387 | Reversal developing system preventing occurrence of image spots | Masashi Tanaka | 1996-08-20 |
| 5514508 | Electrophotosensitive material | Hideo Nakamori, Hiroshi Shiomi, Hirofumi Kawaguchi, Hisakazu Uegaito, Nariaki Muto +4 more | 1996-05-07 |
| 5494765 | Electrophotosensitive material using a phenylenediamine derivative | Hideo Nakamori, Keisuke Sumida, Sakae Saito | 1996-02-27 |
| 5462825 | Electrophotographic photoconductor having a photosensitive layer with charge generating particles and a charge transporting material dispersed in a binder | Masashi Tanaka, Masato Katsukawa, Hideo Nakamori | 1995-10-31 |
| 5449580 | Organic photosensitive material for electrophotography | Hideo Nakamori, Masashi Tanaka, Masato Katsukawa | 1995-09-12 |
| 5408298 | Image forming apparatus | Masashi Tanaka | 1995-04-18 |
| 5386279 | Transfer device in an image-forming apparatus | Masashi Tanaka | 1995-01-31 |
| 5324610 | Electrophotographic organic photosensitive material with diphenoquinone derivative | Masashi Tanaka, Tadashi Sakuma, Hideo Nakamori | 1994-06-28 |
| 5212818 | Radio station presetting method for radio receivers | — | 1993-05-18 |
| 5210736 | Mobile recording-medium playing apparatus | Akira Hayama, Tomohito Mizuno | 1993-05-11 |
| 5024913 | Electrophotographic photosensitive material | Takeshi Yoshida, Kaname Nakatani, Nariaki Tanaka | 1991-06-18 |