Inventor
HIRAI SHUJI
JP60 patents
⚠️ This page may combine multiple inventors who share the name “HIRAI SHUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
16 patentsUS7203431B2Apr 10, 2007
Abnormality determining method, abnormality determining apparatus, and image forming apparatus
RICOH KK54 citations96
US7110917B2Sep 19, 2006
Abnormality determining method, and abnormality determining apparatus and image forming apparatus using same
RICOH KK57 citations96
US7554574B2Jun 30, 2009
Abnormal state occurrence predicting method, state deciding apparatus, and image forming system
RICOH KK29 citations93
US7457550B2Nov 25, 2008
Abnormality determining apparatus, image forming apparatus, copying machine, and information obtaining method
RICOH KK32 citations93
US7327962B2Feb 5, 2008
Abnormality determining method, abnormality determining apparatus, and image forming apparatus
RICOH KK35 citations93
US7193642B2Mar 20, 2007
Image quality detecting apparatus, image forming apparatus and method, and image quality controlling apparatus and method
RICOH KK31 citations93
US6975338B2Dec 13, 2005
Image quality detecting apparatus, image forming apparatus and method, and image quality controlling apparatus and method
RICOH KK36 citations93
US7343126B2Mar 11, 2008
Image forming apparatus including a transfer belt having image forming units disposed thereabout
RICOH KK15 citations92
US7203452B2Apr 10, 2007
Tandem image forming device having a side-by-side arrangement of image forming sections
RICOH KK28 citations92
US7151901B2Dec 19, 2006
Image forming apparatus and associated method of detecting developer deterioration
RICOH KK26 citations92
US6757512B2Jun 29, 2004
Tandem image forming device, image forming apparatus and method for using the same
RICOH KK32 citations92
US7778555B2Aug 17, 2010
Abnormality determining apparatus, image forming apparatus, copying machine, and information obtaining method
RICOH KK14 citations84
US7751741B2Jul 6, 2010
Optical sensor and image forming apparatus including same
RICOH KK16 citations84
US7693466B2Apr 6, 2010
Method for arranging image forming sections
RICOH KK11 citations84
US7359660B2Apr 15, 2008
Developing device, process cartridge and image forming apparatus loaded therewith
RICOH KK15 citations84
US7289746B2Oct 30, 2007
Charging device, process cartridge, and image forming apparatus
RICOH KK5 citations63
KANEKO SATOSHI
11 patentsUS9857747B2Jan 2, 2018
Image forming apparatus that adjusts a voltage output based on toner adhesion
KANEKO SATOSHI2 citations73
US9996037B2Jun 12, 2018
Image forming apparatus and image forming method which cyclically change a charging power and a developing bias applied to a developer bearer
KANEKO SATOSHI2 citations72
US9727001B2Aug 8, 2017
Technique for reducing uneven image density in an image forming apparatus
KANEKO SATOSHI2 citations72
US9400442B2Jul 26, 2016
Image forming apparatus
KANEKO SATOSHI2 citations63
US9348288B2May 24, 2016
Image forming apparatus forming a plurality of displaced test latent image parts
KANEKO SATOSHI2 citations60
US9188924B2Nov 17, 2015
Image forming apparatus and image forming method
KANEKO SATOSHI1 citations52
US8977148B2Mar 10, 2015
Image forming apparatus and image forming method
KANEKO SATOSHI1 citations52
US9152896B2Oct 6, 2015
Image forming apparatus and image forming method
KANEKO SATOSHI1 citations51
US9423752B2Aug 23, 2016
Image forming apparatus and method adjusting image forming condition
KANEKO SATOSHI0 citations42
US9182720B2Nov 10, 2015
Image forming apparatus capable of reducing image density irregularity
KANEKO SATOSHI0 citations42
US8760724B2Jun 24, 2014
Gradation correction for an image forming apparatus
KANEKO SATOSHI0 citations42
HIRAI SHUJI
8 patentsUS8107837B2Jan 31, 2012
Image forming apparatus, control method thereof, program and recording medium
HIRAI SHUJI7 citations83
US8834189B2Sep 16, 2014
Rotatable connector device
HIRAI SHUJI6 citations72
US8503895B2Aug 6, 2013
Image forming apparatus capable of stably controlling image density
HIRAI SHUJI2 citations62
US9046850B2Jun 2, 2015
Image forming apparatus capable of reducing image density irregularity
HIRAI SHUJI1 citations52
US8808008B2Aug 19, 2014
Rotatable connector device
HIRAI SHUJI1 citations51
US9778593B2Oct 3, 2017
Image forming apparatus
HIRAI SHUJI1 citations50
US8818216B2Aug 26, 2014
Image forming apparatus, image forming method, and computer program product
HIRAI SHUJI0 citations41
US8693053B2Apr 8, 2014
Image forming apparatus and correction effect verification method
HIRAI SHUJI0 citations41
RICOH CO LTD
5 patentsUS7962054B2Jun 14, 2011
Image forming apparatus having a function of predicting device deterioration based on a plurality of types of operation control information
RICOH CO LTD11 citations84
US7903269B2Mar 8, 2011
Abnormality determining apparatus, image forming apparatus including the abnormality determining apparatus, and abnormality determining method
RICOH CO LTD11 citations84
US8027605B2Sep 27, 2011
Image forming apparatus and image density control method
RICOH CO LTD2 citations63
US7929873B2Apr 19, 2011
Image forming apparatus and image density control method
RICOH CO LTD5 citations61
US7903986B2Mar 8, 2011
Reuse method and a reusable device for an image forming apparatus having a first process linear velocity and a second image processing apparatus having a second process linear velocity
RICOH CO LTD0 citations42
FURUKAWA ELECTRIC CO LTD
3 patentsSUZUKI SHINGO
2 patentsISHIBASHI HITOSHI
1 patentKAWAMOTO HIROYUKI
1 patentNAKAZATO YASUSHI
1 patentYAMANO MOTOYOSHI
1 patentMUTO TETSUYA
1 patentShowing the top 50 of 60 patents by PatentIndex Score.