CH

Chikara Hiraoka

Ricoh Company: 11 patents #2,054 of 9,818Top 25%
RS Ricoh Printing Systems: 7 patents #8 of 200Top 4%
HI Hitachi: 6 patents #6,582 of 28,497Top 25%
HC Hitachi Koki Co.: 2 patents #413 of 888Top 50%
UI Ube Industries: 1 patents #895 of 1,686Top 55%
📍 Ibaraki, JP: #303 of 6,779 inventorsTop 5%
Overall (All Time): #174,579 of 4,157,543Top 5%
24
Patents All Time

Issued Patents All Time

Showing 1–24 of 24 patents

Patent #TitleCo-InventorsDate
9201394 Image forming apparatus and air flow path therein Tamotsu Ikeda, Yuusuke Furuichi 2015-12-01
9116476 Fixing device and image forming apparatus Yoshiharu Takahashi, Tamotsu Ikeda, Kohta Sakaya, Yoshihiro Kawakami 2015-08-25
8874021 Media guide mechanism, fixing device and image forming apparatus incorporating same Kohta Sakaya, Yasuhide Ohkubo, Tamotsu Ikeda, Yoshiharu Takahashi, Toshio Ogiso 2014-10-28
8867942 Lever switcher with mechanism for minimizing mechanical shock and sound and fixing device and image forming apparatus incorporating lever switcher Tamotsu Ikeda, Kohta Sakaya, Yoshiharu Takahashi 2014-10-21
8798517 Sheet supplying device and image forming apparatus incorporating same Yasuo Matsuyama, Ippei Kimura, Ikuo Fujii, Takamitsu Ikematsu, Masafumi Takahira +5 more 2014-08-05
8699929 Guide device with mechanism capable of minimizing damage to toner image and recording medium and fixing device and image forming apparatus incorporating same Kohta Sakaya, Yoshiharu Takahashi, Tamotsu Ikeda 2014-04-15
8204421 Fusing apparatus and image forming apparatus Yoshihiro Fukuhata 2012-06-19
8131197 Fixing device and electro photographic apparatus using the same Kazuhiro Wakamatsu, Katsumi Kumada 2012-03-06
8073375 Fixing unit and image forming apparatus having the same Kazuhiro Wakamatsu, Katsumi Kumada 2011-12-06
7970311 Developing device and image forming apparatus using the same Kenji Nakamura, Yuichiro Suzuki, Katsumi Kumada, Shoji Takeya 2011-06-28
7761044 Fixing device and image forming apparatus using the same Masahiro Yagi, Toshio Ogiso, Shigeru Obata, Toru Hanashima, Osamu Saito 2010-07-20
7477867 Fixing device having cleaner and temperature detector Toru Hanashima, Masahiko Saito, Shunichi Oohara, Toshio Ogiso 2009-01-13
7406287 Fixing device and image forming apparatus provided with fixing device Hiroyoshi Matsumoto, Toshio Ogiso, Shigeru Obata, Masahiro Yagi, Chiharu Kamoshida 2008-07-29
7298981 Fixing device and image forming apparatus with guide having adjustable biasing angle Shunichi Oohara, Hiroyuki Seki, Toshio Ogiso, Shigeru Obata, Toru Hanashima +1 more 2007-11-20
7231158 Image forming apparatus having a fixing device with improved temperature detection features Toru Hanashima, Tetsuji Takegoshi, Goro Sato, Shogo Matsumoto 2007-06-12
7167670 Electro-photographic apparatus with a heating roller and pressurizing member Shigeru Obata, Shunichi Oohara, Toshio Ogiso, Kenji Asuwa, Toru Hanashima 2007-01-23
7142803 Fixing device and image forming apparatus Tuyoshi Koyama, Toshio Ogiso, Kazuo Kikuchi, Tetsuji Takegoshi, Toru Hanashima +1 more 2006-11-28
6928257 Image forming and recording apparatus with three pressure members Toshio Ogiso, Masaru Nakano, Hiromitsu Fukuda, Shigeru Obata, Toru Hanashima +8 more 2005-08-09
6661994 Electrophotographic image forming system Yoshio Ohuchi, Kazuhiro Wakamatsu, Hisao Suka, Katsumi Kumada, Shizuo Tsuruta +6 more 2003-12-09
6400923 Fixing device improved in offset-prevention Hiromitsu Fukuda, Toshio Ogiso, Masaru Nakano, Kazuo Kikuchi, Katsumi Kumada +3 more 2002-06-04
6130408 Recording apparatus with conveyed recording sheet heated by movable heater Hiromitsu Fukuda, Hidefumi Ohtsuka, Shuho Yokokawa, Isao Nakajima, Yoji Hirose +1 more 2000-10-10
6094549 Electrograph apparatus enabling removal of offensive substances Katsumi Kumada, Katsuyoshi Onose 2000-07-25
5778294 Electrophotographic apparatus and belt fixing device with non-uniform nip pressure Junichi Matsuno, Hiromitsu Fukuda 1998-07-07
5499087 Heat fixing device and electrophotographic apparatus incorporating the same having a PTC heating element received in a recess of a holder Junichi Matsuno, Masao Mitani, Hiroshi Oda, Toshikazu Tsumura 1996-03-12