Partial year: Data through Q3 2025 (Sept 30). Full-year totals not yet available.
RS

Ryohhei Sugiyama

Ricoh Company: 5 patents #14 of 689Top 3%
Overall (2025): #20,643 of 469,880Top 5%
5
Patents 2025

Issued Patents 2025

Showing 1–5 of 5 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
12197150 Fixing device and image forming apparatus incorporating the same Ryohei Matsuda, Yoshiki Yamaguchi, Takashi Seto, Hiroshi Yoshinaga 2025-01-14
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