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Junji Shirakawa

Ricoh Company: 21 patents #1,013 of 9,818Top 15%
HC Hitachi Koki Co.: 10 patents #110 of 888Top 15%
RS Ricoh Printing Systems: 1 patents #97 of 200Top 50%
IBM: 1 patents #44,794 of 70,183Top 65%
📍 Ibaraki, JP: #158 of 6,779 inventorsTop 3%
Overall (All Time): #108,414 of 4,157,543Top 3%
33
Patents All Time

Issued Patents All Time

Showing 1–25 of 33 patents

Patent #TitleCo-InventorsDate
9348284 Sheet conveyor and image forming apparatus incorporating the sheet conveyor Takeshi Watanabe, Kenji Ishii, Yuji Karikusa 2016-05-24
9193550 Sheet aligning device and image forming apparatus including the same Takayuki Muneyasu, Yutaka Shoji, Takeshi Watanabe 2015-11-24
8985578 Sheet aligning device and image forming apparatus including the same Takayuki Muneyasu, Yutaka Shoji, Takeshi Watanabe 2015-03-24
8577261 Belt device and image forming apparatus Makoto Nakura, Hiroshi Suzuki 2013-11-05
8515310 Pressing mechanism, transfer device, and image forming apparatus Makoto Nakura, Hiroshi Suzuki, Hirofumi Ohkushi 2013-08-20
8498566 Image forming apparatus Yutaka Shoji, Takayuki Muneyasu 2013-07-30
8451466 Image forming apparatus Yutaka Shoji, Takayuki Muneyasu 2013-05-28
8419013 Sheet aligning device and image forming apparatus including the same Takayuki Muneyasu, Yutaka Shoji, Takeshi Watanabe 2013-04-16
8417176 Image forming apparatus Yutaka Shoji, Takayuki Muneyasu 2013-04-09
8355642 Image forming apparatus which continues to convey a sheet if the sheet is only slightly delayed Yutaka Shoji, Takayuki Muneyasu 2013-01-15
8317192 Sheet conveyance unit and image forming apparatus including same Yuji Karikusa, Yutaka Shoji 2012-11-27
8238793 Belt device and image forming apparatus having a belt correcting unit and an adjusting unit Makoto Nakura, Hiroshi Suzuki 2012-08-07
8213851 Conveying device and image forming apparatus Yutaka Shoji, Takayuki Muneyasu 2012-07-03
8160462 Image forming apparatus having a transport status detection unit Yutaka Shoji, Takayuki Muneyasu 2012-04-17
8113514 Sheet decurling device and image forming apparatus Yasuyuki Sekino, Yutaka Shoji, Takayuki Muneyasu 2012-02-14
8095056 Pressure-applying device, transfer device, and image forming apparatus Susumu Mikajiri, Junichi Kawase, Makoto Nakura 2012-01-10
8025288 Conveying device and image forming apparatus Yutaka Shoji, Takayuki Muneyasu 2011-09-27
8014701 Contacting and separating mechanism and image forming apparatus Makoto Nakura, Hiroshi Suzuki 2011-09-06
7931263 Image forming system having enhanced functionality Hiroshi Takahagi, Yutaka Shoji 2011-04-26
7822359 Image forming apparatus having a control device which is rotatably linked Koji Kawahara, Mamoru Takayama 2010-10-26
7722039 Sheet conveying device and image forming apparatus Yutaka Shoji, Takayuki Muneyasu 2010-05-25
7010242 Image forming apparatus Takashi Suzuki, Masayuki Ainoya, Yoshitaka Fujinuma, Koji Kato, Kazuo Sunou 2006-03-07
6640078 Electrophotographic apparatus having a paper holding member Kenji Ishii, Masayuki Ainoya, Minoru Seino, Hideki Ando 2003-10-28
6254086 Sheet accommodating device Kazuo Sunou, Takayuki Muneyasu 2001-07-03
D438892 Photosensitive drum for printer Yuichiro Suzuki, Masayuki Ainoya, Yoshitaka Fujinuma 2001-03-13