HF

Hitoshi Fujiwara

Ricoh Company: 32 patents #573 of 9,818Top 6%
Kawasaki: 9 patents #199 of 2,943Top 7%
JA Japan Aerospace Exploration Agency: 9 patents #4 of 546Top 1%
F& F&F: 7 patents #1 of 4Top 25%
SS Suwa Seikosha: 3 patents #32 of 220Top 15%
EP Epson: 3 patents #6 of 66Top 10%
SI Seiko Instruments: 2 patents #605 of 1,437Top 45%
MC Mabuchi Motor Co.: 2 patents #62 of 228Top 30%
Brother Kogyo: 1 patents #2,155 of 2,767Top 80%
SS Sii P & S: 1 patents #8 of 14Top 60%
CC C.Uyemura & Co.: 1 patents #85 of 180Top 50%
FC Fuji Electric Co.: 1 patents #1,354 of 2,643Top 55%
HA Hakko: 1 patents #35 of 70Top 50%
IS Ist: 1 patents #20 of 49Top 45%
MC M.I.T. International Co.: 1 patents #3 of 3Top 100%
SE Seiko Epson: 1 patents #5,551 of 7,774Top 75%
SK Shinshu Seiki Kabushiki Kaisha: 1 patents #14 of 38Top 40%
📍 Tokyo, CA: #135 of 583 inventorsTop 25%
Overall (All Time): #34,471 of 4,157,543Top 1%
64
Patents All Time

Issued Patents All Time

Showing 1–25 of 64 patents

Patent #TitleCo-InventorsDate
12372903 Fixing device and image forming apparatus Yutaka Ikebuchi, Shigeo Nanno, Yuusuke Furuichi 2025-07-29
12339604 Fixing device and image forming apparatus including a pivot restrictor to restrict pivoting of a conductive member Hiromasa Takagi, Shigeo Nanno, Yutaka Ikebuchi, Yuusuke Furuichi 2025-06-24
12117748 Fixing device and image forming apparatus incorporating same 2024-10-15
11966179 Fixing device and image forming apparatus incorporating same 2024-04-23
11947295 Heating device, fixing device, and image forming apparatus 2024-04-02
11886134 Heating device, fixing device, and image forming apparatus 2024-01-30
11874620 Fixing device and image forming apparatus incorporating same 2024-01-16
11543765 Fixing device and image forming apparatus incorporating same 2023-01-03
11454910 NIP formation member having a base, a thermal conductor, and a stabilizer, and fixing device and image forming apparatus using the same Naoki Iwaya 2022-09-27
11408346 Fuel injector Ryusuke Matsuyama 2022-08-09
11092340 Fuel injection device Ryusuke Matsuyama, Takeo Oda 2021-08-17
11054775 Fixing device and image forming apparatus incorporating same Ryohei Matsuda, Yoshiharu Takahashi, Naoki Iwaya 2021-07-06
11054774 Nip forming member, fixing device, and image forming apparatus Yoshiharu Takahashi, Naoki Iwaya, Ippei Fujimoto, Yoshiki Yamaguchi 2021-07-06
11054767 Nip formation member, heating device, fixing device and image forming apparatus Yoshiharu Takahashi, Hiroyuki Shimada 2021-07-06
11009817 Presser, fixing device, and image forming apparatus Hiroshi Kajiyama 2021-05-18
10996596 Fixing device including a nip formation pad movable with respect to a guide 2021-05-04
10990049 Driver, fixing device, and image forming apparatus 2021-04-27
10955780 Fixing device and image forming apparatus incorporating same Takuya Seshita, Hiroshi Kajiyama 2021-03-23
10928763 Fixing device and image forming apparatus Hiroyuki Shimada, Hiroshi Yoshinaga 2021-02-23
10921739 Nip former, fixing device, and image forming apparatus 2021-02-16
10697638 Fuel injection device Masayoshi Kobayashi, Ryusuke Matsuyama, Kenta Yamaguchi, Hideki Ogata, Takeo Nishiura 2020-06-30
10648671 Fuel injection device Masayoshi Kobayashi, Ryusuke Matsuyama, Kenta Yamaguchi 2020-05-12
10558154 Image forming apparatus incorporating pressing device Hiroshi Kajiyama, Naoki Iwaya, Takuya Seshita, Takahiro Imada, Yoshiharu Takahashi +1 more 2020-02-11
10132499 Fuel injection device Ryusuke Matsuyama, Masayoshi Kobayashi, Atsushi Horikawa 2018-11-20
9740147 Separator, fixing device, and image forming apparatus Tomoya Adachi, Tomohiko Fujii, Masahiro Samei, Yutaka Naitoh, Yoshiharu Takahashi +3 more 2017-08-22