Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9720343 | Conductive member, charging device, process cartridge, and image forming apparatus | Yukiko KAMIJO, Taketoshi Hoshizaki | 2017-08-01 |
| 9291923 | Electrophotographic photoreceptor, process cartridge, and image forming apparatus | Shigeto Hashiba | 2016-03-22 |
| 9098007 | Charging member, charging device, process cartridge, and image forming apparatus | Minoru Rokutan, Satoya Sugiura, Akihiro Nonaka, Takuro Hagiwara, Minoru Oshima | 2015-08-04 |
| 8802338 | Electrophotographic photoreceptor, process cartridge and image forming apparatus | Takahiro Suzuki | 2014-08-12 |
| 8802337 | Electrophotographic photoreceptor, image forming apparatus, and process cartridge | Akihiro Kawasaki, Shigeto Hashiba, Hirofumi Nakamura, Satoya Sugiura | 2014-08-12 |
| 8524432 | Electrophotographic photoreceptor, process cartridge, and image forming apparatus | Masaru Miura, Shinya Yamamoto, Isamu Ishiko, Tetsuya Ezumi | 2013-09-03 |
| 8361686 | Electrophotographic photoreceptor, process cartridge and image forming apparatus | Shinya Yamamoto, Masaru Miura, Hitoshi Takimoto, Takahiro Suzuki, Tetsunao Koujiri | 2013-01-29 |
| 8263299 | Electrophotographic photoreceptor, process cartridge, and image forming apparatus | Kaori Iemura, Katsumi Nukada, Kazuyuki Nakamura | 2012-09-11 |
| 8103191 | Image forming apparatus | Takahiro Suzuki, Isamu Ishiko | 2012-01-24 |
| 8021810 | Image carrier, process cartridge and image-forming apparatus | Hitoshi Takimoto, Kenta IDE, Toru Asahi, Takahiro Suzuki, Koji Bando | 2011-09-20 |
| 7763406 | Electrophotographic photoreceptor, process cartidge and electrophotographic apparatus | Hirofumi Nakamura, Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Koji Bando | 2010-07-27 |
| 7702256 | Image-forming apparatus including an electrophotographic photoreceptor having an undercoat layer with metal oxide particles and an acceptor compound | Hirofumi Nakamura, Taketoshi Hoshizaki, Yu Qi, Nan-Xing Hu, Ah-Mee Hor | 2010-04-20 |
| 7580655 | Charging roller, electrophotographic process cartridge, and image forming apparatus | Shigeto Hashiba, Takahiro Suzuki, Koji Bando, Makoto Takemoto | 2009-08-25 |
| 7561828 | Image-forming apparatus including an electrophotographic photoreceptor having an undercoat layer | Hirofumi Nakamura, Taketoshi Hoshizaki, Yu Qi, Ah-Mee Hor, Nan-Xing Hu | 2009-07-14 |
| 7381512 | Hydroxygallium phthalocyanine pigment and process for the production thereof, electrophotographic photoreceptor, process cartridge, electrophotographic device and image formation method | Kazuya Hongo, Kozo Ota, Masahiko Miyamoto, Yukiko KAMIJO, Kenji Inoue | 2008-06-03 |
| 7358984 | Image forming apparatus including multibeam exposure unit having surface emitting laser array | Taketoshi Hoshizaki, Takahiro Suzuki | 2008-04-15 |
| 7153574 | Surface grafted metal oxide particles and compositions comprising the same | Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Hirofumi Nakamura | 2006-12-26 |
| 6773857 | Electrophotographic photoreceptor, processes for producing the same, process cartridge, and electrophotographic apparatus | Hirofumi Nakamura, Ichiro Takegawa, Masahiro Iwasaki, Michiko Aida, Yukiko KAMIJO +5 more | 2004-08-10 |
| 6268096 | Titanyl phthalocyanine crystal and electrophotographic photoreceptor using the same | Yasuo Sakaguchi, Taketoshi Hoshizaki, Fumio Ojima, Masayuki Nishikawa, Kohichi Yamamoto +1 more | 2001-07-31 |
| 6232466 | Process for preparing titanyl phthalocyanine crystal by solvent treatment of amorphous or quasi-amorphous titanyl phthalocyanine | Katsumi Daimon, Akihiko Tokida, Katsumi Nukada, Yasuo Sakaguchi | 2001-05-15 |
| 5856471 | Phthalocyanine pigment for electrophotographic photoreceptors | Takahiro Suzuki, Katsumi Nukada, Katsumi Daimon, Yasuo Sakaguchi | 1999-01-05 |
| 5815776 | Electrophotographic apparatus with photoreceptor having undercoat layer, containing an electronic transporting pigment and reactive organometallic compound | — | 1998-09-29 |
| 5795690 | Electrophotographic photoreceptor, image forming apparatus and image forming process | Ichiro Takegawa, Hiroshi Yamamoto, Koji Goshima, Takaaki Kimura | 1998-08-18 |
| 5677097 | Electrophotographic photoreceptor | Katsumi Nukada | 1997-10-14 |
| 5658702 | Electrophotographic photoreceptor having undercoat layer containing an electron transporting pigment and reactive organometallic compound | — | 1997-08-19 |