RS

Ryohhei Sugiyama

Ricoh Company: 11 patents #2,054 of 9,818Top 25%
Overall (All Time): #430,922 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
12422766 Fixing device and image forming apparatus incorporating same Hiroshi Yoshinaga, Takashi Seto, Ryohei Matsuda, Yoshiki Yamaguchi 2025-09-23
12386293 Fixing device and image forming apparatus with a controller to switch between a first heating and a second heating Kentaro Yamashita, Takamasa Hase, Arinobu Yoshiura, Daisuke Inoue, Mototaka IWAMA 2025-08-12
12353150 Fixing device and image forming apparatus Hiroshi Yoshinaga, Yoshiki Yamaguchi, Takashi Seto, Ryohei Matsuda 2025-07-08
12197155 Heating device, fixing device, and image forming apparatus with heat shield including first portion and second portion Hiroshi Yoshinaga, Takayuki Andoh, Masahiro Samei, Kota Shiodera, Toshiyuki Kabata 2025-01-14
12197150 Fixing device and image forming apparatus incorporating the same Ryohei Matsuda, Yoshiki Yamaguchi, Takashi Seto, Hiroshi Yoshinaga 2025-01-14
12124194 Heating device, fixing device, and image forming apparatus Takayuki Andoh, Masahiro Samei, Kota Shiodera, Hiroshi Yoshinaga 2024-10-22
11703783 Fixing device and image forming apparatus 2023-07-18
10401766 Image forming apparatus and image forming method with temperature and power-based productivity rate selection Hiroshi Ono, Hironori Yamaoka, Motoyoshi Yamano, Yoshikuni Sasaki, Tetsuo Tokuda 2019-09-03
10191423 Image forming apparatus including a fixing device Hironori Yamaoka, Takashi Sakamaki, Tetsuo Tokuda, Akiyasu Amita, Shinichi Namekata +4 more 2019-01-29
9817345 Fixing device, image forming apparatus, and method of controlling fixing device Motoyoshi Yamano, Tetsuo Tokuda, Yoshikuni Sasaki, Hiroshi Ono, Hironori Yamaoka +3 more 2017-11-14
9696672 Drive transmission unit, fixing device with drive transmission unit, and image forming apparatus having fixing device with drive transmission unit Hiroshi Ono, Tetsuo Tokuda, Yoshikuni Sasaki, Hironori Yamaoka, Yamano Motoyoshi 2017-07-04