YI

Yoshikuni Ishikawa

Ricoh Company: 25 patents #815 of 9,818Top 9%
Overall (All Time): #164,016 of 4,157,543Top 4%
25
Patents All Time

Issued Patents All Time

Showing 1–25 of 25 patents

Patent #TitleCo-InventorsDate
10124970 Sheet feeder and image forming apparatus incorporating same Tetsutaro Yasuda, Manabu Nonaka 2018-11-13
9302868 Sheet feeder and image forming apparatus incorporating same Tetsutaro Yasuda, Manabu Nonaka 2016-04-05
9290341 Sheet conveyor and image forming apparatus incorporating same Manabu Nonaka 2016-03-22
9004482 Sheet conveyor and image forming apparatus incorporating same Manabu Nonaka 2015-04-14
8944708 Sheet conveying device, and image forming apparatus including same Hiroyuki Watase, Yasuhiro Sagawa, Kenji Ueda, Masayuki Ueda, Naoyuki Okamoto +1 more 2015-02-03
8857809 Sheet separation/conveyance device and image forming apparatus incorporating same Tsugunao Toyooka, Manabu Nonaka, Satoshi Kuno 2014-10-14
8774699 Sheet feeder and image forming apparatus Shun Kobayashi, Aki Ikeda, Manabu Nonaka 2014-07-08
8752955 Inkjet printer Shun Kobayashi, Kazunori Bannai 2014-06-17
8746675 Sheet feeder and image forming apparatus incorporating same Hajime Nishida, Manabu Nonaka 2014-06-10
8628074 Sheet feeding device and image forming apparatus incorporating same Hideto Higaki, Manabu Nonaka 2014-01-14
8585040 Sheet feeder and image forming apparatus using the same Aki Ikeda, Manabu Nonaka 2013-11-19
8573586 Sheet feeder and image forming apparatus Shun Kobayashi, Manabu Nonaka 2013-11-05
8532557 Attachment assist device and image forming apparatus including same Tadashi Kusumi, Katsuhiko Miki, Hiroshi Kajiyama 2013-09-10
8523170 Sheet feeder and image forming apparatus incorporating same Hajime Nishida, Manabu Nonaka 2013-09-03
8511668 Sheet feeding device and image forming apparatus incorporating same Yu Wakabayashi, Toshiaki Takahashi, Manabu Nonaka 2013-08-20
8480073 Sheet feeder and image forming apparatus incorporating same Shun Kobayashi, Manabu Nonaka 2013-07-09
8474811 Sheet feeding device and image forming apparatus incorporating same Toshiaki Takahashi, Yu Wakabayashi, Manabu Nonaka 2013-07-02
8439347 Sheet conveying device and image forming apparatus Manabu Nonaka, Yu Wakabayashi, Aki Ikeda 2013-05-14
8424865 Sheet feeding device and image forming apparatus incorporating same Yosuke Eguchi, Manabu Nonaka 2013-04-23
8342507 Sheet conveying device and image forming apparatus Toshiaki Takahashi, Manabu Nonaka 2013-01-01
8267394 Sheet feeding device and image forming apparatus incorporating same Hideto Higaki, Manabu Nonaka 2012-09-18
8177217 Sheet feeding device and image forming apparatus incorporating same Toshiaki Takahashi, Yu Wakabayashi, Manabu Nonaka 2012-05-15
7992858 Sheet conveying apparatus, image scanning apparatus, and image forming apparatus Yasuhiro Sagawa, Kenji Ueda, Masayuki Ueda, Hiroyuki Watase, Naoyuki Okamoto +2 more 2011-08-09
7708276 Sheet conveying path switching device used in image forming apparatus, and sheet conveying device Naoyuki Okamoto, Hiroyuki Watase, Masayuki Ueda, Kenji Ueda, Yasuhiro Sagawa +1 more 2010-05-04
7621519 Sheet conveying apparatus, image reading apparatus, and image forming apparatus Yasuhiro Sagawa, Kenji Ueda, Masayuki Ueda, Tamiya Akimoto, Naoyuki Okamoto +2 more 2009-11-24