YY

Yoshiki Yamaguchi

Ricoh Company: 115 patents #24 of 9,818Top 1%
Mitsubishi Electric: 4 patents #7,099 of 25,717Top 30%
HI Hitachi: 3 patents #10,712 of 28,497Top 40%
MM Mitsubishi Mining: 2 patents #467 of 2,247Top 25%
IBM: 1 patents #44,794 of 70,183Top 65%
HC Hirose Electric Co.: 1 patents #259 of 407Top 65%
TT The University Of Tokyo: 1 patents #1,000 of 2,633Top 40%
GL Glory: 1 patents #217 of 385Top 60%
Overall (All Time): #8,739 of 4,157,543Top 1%
127
Patents All Time

Issued Patents All Time

Showing 51–75 of 127 patents

Patent #TitleCo-InventorsDate
9176440 Fixing device and image forming apparatus Haruyuki Honda, Kazuhito Kishi, Yasunori Ishigaya, Ippei Fujimoto, Misaki Shimizu +1 more 2015-11-03
9158250 Fixing device and image forming apparatus Takahiro Imada, Masaaki Yoshikawa, Kenji Ishii, Hiroshi Yoshinaga, Yuji Arai +9 more 2015-10-13
9152106 Fixing device and image forming apparatus including same Takayuki Seki, Yuji Arai, Yutaka Ikebuchi, Shuntaroh Tamaki, Kazuya Saito +10 more 2015-10-06
9141051 Fixing device and image forming apparatus Hiroshi Yoshinaga, Takayuki Seki, Yuji Arai, Ryuuichi Mimbu, Yutaka Ikebuchi +4 more 2015-09-22
9128426 Fixing device and image forming apparatus including same Ippei Fujimoto, Akira Shinshi, Naoki Iwaya, Shuntaroh Tamaki, Hiroshi Yoshinaga +3 more 2015-09-08
9046838 Fixing device and image forming apparatus Yuji Arai, Takayuki Seki, Shuntaroh Tamaki, Yutaka Ikebuchi, Kazuya Saito +17 more 2015-06-02
9046837 Fixing device and method, and image forming apparatus incorporating same Yutaka Ikebuchi, Masaaki Yoshikawa, Kenji Ishii, Yuji Arai, Hiromasa Takagi +9 more 2015-06-02
9046833 Fixing device and image forming apparatus incorporating same Takayuki Seki, Yuji Arai, Shuntaroh Tamaki, Yutaka Ikebuchi, Kazuya Saito +2 more 2015-06-02
8983353 Fixing apparatus and image forming apparatus Arinobu Yoshiura, Masaaki Yoshikawa, Yuji Arai, Tetsuo Tokuda, Yutaka Ikebuchi +9 more 2015-03-17
8953993 Fixing device and image forming apparatus incorporating same Tetsuo Tokuda, Masaaki Yoshikawa, Kenji Ishii, Hiroshi Yoshinaga, Yuji Arai +9 more 2015-02-10
8929789 Fixing device with resistance heating element capable of accurately generating heat and image forming apparatus with fixing device Hiroshi Yoshinaga, Masaaki Yoshikawa, Kenji Ishii, Yuji Arai, Hiromasa Takagi +9 more 2015-01-06
8903296 Fixing device and image forming apparatus incorporating same Toshihiko Shimokawa, Yuji Arai, Hiromasa Takagi, Arinobu Yoshiura, Tetsuo Tokuda +9 more 2014-12-02
8899163 Biomass pulverizing apparatus and biomass/coal mixed-combustion system Kazuhiro Takeuchi, Takuichiro Daimaru, Masaaki Kinoshita, Norichika Kai 2014-12-02
8886090 Fixing device including an engagement-disengagement unit and image forming apparatus equipped with the fixing device Teppei Kawata, Kenji Ishii, Tadashi Ogawa, Arinobu Yoshiura, Toshihiko Shimokawa +12 more 2014-11-11
8873984 Fixing device, image forming apparatus incorporating same, and fixing method Kenji Ishii, Yuji Arai, Arinobu Yoshiura, Toshihiko Shimokawa, Masaaki Yoshikawa +8 more 2014-10-28
8867976 Fixing device, image forming apparatus incorporating same, and method of heating fixing member Ippei Fujimoto, Kenji Ishii, Masaaki Yoshikawa, Hiroshi Yoshinaga, Naoki Iwaya +6 more 2014-10-21
8843043 Fixing device and image forming apparatus incorporating same Naoki Iwaya, Masaaki Yoshikawa, Akira Shinshi, Kenji Ishii, Kenichi Hasegawa +6 more 2014-09-23
8831494 Fixing device and image forming apparatus including same Yutaka Ikebuchi, Hiroshi Yoshinaga, Toshihiko Shimokawa, Masaaki Yoshikawa, Naoki Iwaya +8 more 2014-09-09
8811837 Fixing device and image forming apparatus including same Hiroshi Yoshinaga, Kenichi Hasegawa, Masaaki Yoshikawa, Kenji Ishii, Akira Shinshi +7 more 2014-08-19
8811874 Belt device with mechanism capable of minimizing increase of rotation torque of endless belt and fixing device and image forming apparatus incorporating same Toshihiko Shimokawa, Kenji Ishii, Masaaki Yoshikawa, Hiroshi Yoshinaga, Naoki Iwaya +6 more 2014-08-19
8792797 Fixing device, image forming apparatus, and heater control method Yutaka Ikebuchi, Masaaki Yoshikawa, Kenji Ishii, Hiroshi Yoshinaga, Yuji Arai +9 more 2014-07-29
8761650 Fixing device and image forming apparatus Hiromasa Takagi, Masaaki Yoshikawa, Kenji Ishii, Hiroshi Yoshinaga, Yuji Arai +9 more 2014-06-24
8755732 Image forming apparatus having a transfer unit for transferring an image to a recording sheet Masanao Ehara, Naoki Iwaya 2014-06-17
8737878 Image forming apparatus including removable fixing device Akira Shinshi, Kenichi Hasegawa, Hiroshi Yoshinaga, Naoki Iwaya, Ippei Fujimoto +3 more 2014-05-27
8725038 Belt assembly, fixing device, and image forming apparatus incorporating same Masaaki Yoshikawa, Kenji Ishii, Yuji Arai, Hiromasa Takagi, Naoki Iwaya +9 more 2014-05-13