NK

Naohiro Kumagai

Ricoh Company: 71 patents #85 of 9,818Top 1%
AC Asahi Glass Co.: 4 patents #490 of 2,251Top 25%
Overall (All Time): #25,682 of 4,157,543Top 1%
75
Patents All Time

Issued Patents All Time

Showing 1–25 of 75 patents

Patent #TitleCo-InventorsDate
11789388 Image forming apparatus Tomoya Adachi, Yuusuke Furuichi 2023-10-17
11175610 Image forming apparatus Kazuhiko Watanabe 2021-11-16
11112734 Belt device, belt regulator, roller unit, and image forming apparatus Masanari Fujita, Katsuya Kawagoe, Masaharu Furuya, Hiroki Nakamatsu, Yoshiki Hozumi 2021-09-07
10955771 Belt control device and image forming apparatus incorporating same Masanari Fujita, Katsuya Kawagoe, Masaharu Furuya, Hiroki Nakamatsu, Yoshiki Hozumi 2021-03-23
10281848 Image forming apparatus and image forming method Yuuji Wada, Naoto Kochi, Hiroki Nakamatsu, Kazuki Yogosawa, Takahiro Suzuki +8 more 2019-05-07
10228639 Image forming apparatus with a support to adjust a rotator and a guide Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa, Tatsuya Ohsugi, Kenji Sugiura +2 more 2019-03-12
10185255 Image forming apparatus and image forming method for controlling a secondary transfer bias according to recording sheet type Naoto Kochi, Hirokazu Ishii, Seiichi Kogure, Kenji Sugiura, Shinya Tanaka +6 more 2019-01-22
10152001 Image forming apparatus Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa, Kenji Sugiura, Yuuji Wada 2018-12-11
10120304 Belt device including support portions and an adjuster to adjust positions of the support portions Junpei Fujita, Seiichi Kogure, Kazuki Yogosawa, Kenji Sugiura, Yuuji Wada 2018-11-06
10101690 Image forming apparatus Kenji Sugiura, Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa, Yuuji Wada +1 more 2018-10-16
9897943 Belt unit, transfer unit, and image forming apparatus including a pressing member that presses an edge of a belt Junpei Fujita, Seiichi Kogure, Kazuki Yogosawa, Kenji Sugiura, Yuuji Wada +1 more 2018-02-20
9835987 Image forming apparatus and transfer bias control Kenji Sugiura, Hiroyoshi Haga, Hirokazu Ishii, Seiichi Kogure, Junpei Fujita +5 more 2017-12-05
9817341 Image forming apparatus Tatsuya Ohsugi, Kenji Sugiura, Hirokazu Ishii, Hiroyoshi Haga, Seiichi Kogure +5 more 2017-11-14
9811046 Image forming apparatus Yuuji Wada, Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa, Kenji Sugirua +4 more 2017-11-07
9811036 Belt device and image forming apparatus including same Junpei Fujita, Kenji Sugiura, Yuuji Wada, Hiroyoshi Haga, Seiichi Kogure +1 more 2017-11-07
9766575 Image forming apparatus Tatsuya Ohsugi, Kenji Sugiura, Hirokazu Ishii, Hiroyoshi Haga, Yuuji Wada +5 more 2017-09-19
9740156 Image forming apparatus that adjusts a transfer bias according to surface properties of a transfer target Yuuji Wada, Hiroyoshi Haga, Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa +4 more 2017-08-22
9720364 Image forming apparatus Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa, Tatsuya Ohsugi, Kenji Sugiura +3 more 2017-08-01
9720355 Image forming apparatus Tatsuya Ohsugi, Kenji Sugiura, Jyunya Sakuraba, Hirokazu Ishii, Toshitaka Yamaguchi +7 more 2017-08-01
9696662 Cleaning device and image forming apparatus incorporating same Kazuki Yogosawa, Mitsuru Takahashi, Hiroyoshi Haga, Kenji Sugiura, Seiichi Kogure +5 more 2017-07-04
9690246 Image forming apparatus including contact members disposed side by side at positions opposing a guide unit Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa, Tatsuya Ohsugi, Kenji Sugiura +2 more 2017-06-27
9645530 Image forming apparatus Naoto Kochi, Kenji Sugiura, Hirokazu Ishii, Hiroyoshi Haga, Yuuji Wada +4 more 2017-05-09
9632461 Image forming apparatus controlling transfer bias based on temperature and humidity Kenji Sugiura, Toshitaka Yamaguchi, Hiroyoshi Haga, Hirokazu Ishii, Shinya Tanaka +6 more 2017-04-25
9459564 Image forming apparatus Tatsuya Ohsugi, Kenji Sugiura, Jyunya Sakuraba, Hirokazu Ishii, Toshitaka Yamaguchi +7 more 2016-10-04
9454126 Cleaning device and image forming apparatus including same Yusuke Mitani, Kenji Sugiura, Yuuji Wada, Kazuki Yogosawa, Junpei Fujita +1 more 2016-09-27