Inventor · disambiguated record
Shuji Hirai
Also filed as: HIRAI SHUJI
60 granted patents·6 pending applications·521 citations·filing 2001–2018
98Inventor score
Top patents by PatentIndex Score
66 records- 0197US7193642B2Image quality detecting apparatus, image forming apparatus and method, and image quality controlling apparatus and methodRICOH KK·Filed 2005·Granted Mar 20, 2007·31 cites·21 claims
- 0296US7457550B2Abnormality determining apparatus, image forming apparatus, copying machine, and information obtaining methodRICOH KK·Filed 2006·Granted Nov 25, 2008·32 cites·9 claims
- 0395US7343126B2Image forming apparatus including a transfer belt having image forming units disposed thereaboutRICOH KK·Filed 2007·Granted Mar 11, 2008·15 cites·14 claims
- 0494US7693466B2Method for arranging image forming sectionsRICOH KK·Filed 2008·Granted Apr 6, 2010·11 cites·5 claims
- 0594US7327962B2Abnormality determining method, abnormality determining apparatus, and image forming apparatusRICOH KK·Filed 2007·Granted Feb 5, 2008·35 cites·12 claims
- 0693US7359660B2Developing device, process cartridge and image forming apparatus loaded therewithRICOH KK·Filed 2005·Granted Apr 15, 2008·15 cites·7 claims
- 0793US6975338B2Image quality detecting apparatus, image forming apparatus and method, and image quality controlling apparatus and methodRICOH KK·Filed 2003·Granted Dec 13, 2005·36 cites·72 claims
- 0893US6757512B2Tandem image forming device, image forming apparatus and method for using the sameRICOH KK·Filed 2001·Granted Jun 29, 2004·32 cites·61 claims
- 0992US7203452B2Tandem image forming device having a side-by-side arrangement of image forming sectionsRICOH KK·Filed 2004·Granted Apr 10, 2007·28 cites·16 claims
- 1091US7962054B2Image forming apparatus having a function of predicting device deterioration based on a plurality of types of operation control informationRICOH CO LTD·Filed 2007·Granted Jun 14, 2011·11 cites·12 claims
- 1191US7778555B2Abnormality determining apparatus, image forming apparatus, copying machine, and information obtaining methodRICOH KK·Filed 2008·Granted Aug 17, 2010·14 cites·22 claims
- 1290US7203431B2Abnormality determining method, abnormality determining apparatus, and image forming apparatusRICOH KK·Filed 2004·Granted Apr 10, 2007·54 cites·7 claims
- 1390US7110917B2Abnormality determining method, and abnormality determining apparatus and image forming apparatus using sameRICOH KK·Filed 2004·Granted Sep 19, 2006·57 cites·48 claims
- 1489US7903269B2Abnormality determining apparatus, image forming apparatus including the abnormality determining apparatus, and abnormality determining methodRICOH CO LTD·Filed 2005·Granted Mar 8, 2011·11 cites·28 claims
- 1587US7751741B2Optical sensor and image forming apparatus including sameRICOH KK·Filed 2008·Granted Jul 6, 2010·16 cites·11 claims
- 1686US7151901B2Image forming apparatus and associated method of detecting developer deteriorationRICOH KK·Filed 2003·Granted Dec 19, 2006·26 cites·17 claims
- 1784US8107837B2Image forming apparatus, control method thereof, program and recording mediumHIRAI SHUJI·Filed 2009·Granted Jan 31, 2012·7 cites·17 claims
- 1883US8095025B2Image forming apparatus capable of efficient toner concentration controlISHIBASHI HITOSHI·Filed 2007·Granted Jan 10, 2012·7 cites·20 claims
- 1982US9996037B2Image forming apparatus and image forming method which cyclically change a charging power and a developing bias applied to a developer bearerKANEKO SATOSHI·Filed 2017·Granted Jun 12, 2018·2 cites·13 claims
- 2082US9857747B2Image forming apparatus that adjusts a voltage output based on toner adhesionKANEKO SATOSHI·Filed 2015·Granted Jan 2, 2018·2 cites·22 claims
- 2182US9400442B2Image forming apparatusKANEKO SATOSHI·Filed 2015·Granted Jul 26, 2016·2 cites·9 claims
- 2281US9727001B2Technique for reducing uneven image density in an image forming apparatusKANEKO SATOSHI·Filed 2016·Granted Aug 8, 2017·2 cites·9 claims
- 2381US7554574B2Abnormal state occurrence predicting method, state deciding apparatus, and image forming systemRICOH KK·Filed 2004·Granted Jun 30, 2009·29 cites·25 claims
- 2479US10439348B2Rotary connector deviceFURUKAWA ELECTRIC CO LTD·Filed 2017·Granted Oct 8, 2019·5 cites·12 claims
- 2579US9348288B2Image forming apparatus forming a plurality of displaced test latent image partsKANEKO SATOSHI·Filed 2015·Granted May 24, 2016·2 cites·13 claims
- 2677US9052663B2Image forming apparatusSUZUKI SHINGO·Filed 2014·Granted Jun 9, 2015·2 cites·10 claims
- 2776US8834189B2Rotatable connector deviceHIRAI SHUJI·Filed 2012·Granted Sep 16, 2014·6 cites·6 claims
- 2876US8503895B2Image forming apparatus capable of stably controlling image densityHIRAI SHUJI·Filed 2011·Granted Aug 6, 2013·2 cites·9 claims
- 2976US7929873B2Image forming apparatus and image density control methodRICOH CO LTD·Filed 2008·Granted Apr 19, 2011·5 cites·15 claims
- 3075US8831449B2Image forming apparatus capable of optimally performing density fluctuation correctionSUZUKI SHINGO·Filed 2012·Granted Sep 9, 2014·2 cites·5 claims
- 3173US9778593B2Image forming apparatusHIRAI SHUJI·Filed 2015·Granted Oct 3, 2017·1 cites·20 claims
- 3270US8998628B2Rotatable connector deviceFURUKAWA ELECTRIC CO LTD·Filed 2013·Granted Apr 7, 2015·4 cites·3 claims
- 3369US9188924B2Image forming apparatus and image forming methodKANEKO SATOSHI·Filed 2013·Granted Nov 17, 2015·1 cites·15 claims
- 3469US8977148B2Image forming apparatus and image forming methodKANEKO SATOSHI·Filed 2013·Granted Mar 10, 2015·1 cites·13 claims
- 3569US8265494B2Image forming apparatus including a toner supply controller to control a supply of tonerKAWAMOTO HIROYUKI·Filed 2009·Granted Sep 11, 2012·3 cites·12 claims
- 3668US9411278B2Image forming apparatusYAMANO MOTOYOSHI·Filed 2014·Granted Aug 9, 2016·1 cites·8 claims
- 3768US9046850B2Image forming apparatus capable of reducing image density irregularityHIRAI SHUJI·Filed 2012·Granted Jun 2, 2015·1 cites·19 claims
- 3865US9141059B2Image forming apparatusMUTO TETSUYA·Filed 2014·Granted Sep 22, 2015·1 cites·10 claims
- 3964US8027605B2Image forming apparatus and image density control methodRICOH CO LTD·Filed 2008·Granted Sep 27, 2011·2 cites·8 claims
- 4062US9152896B2Image forming apparatus and image forming methodKANEKO SATOSHI·Filed 2014·Granted Oct 6, 2015·1 cites·11 claims
- 4155US8175470B2Image forming apparatus having a function of predicting device deterioration based on a plurality of types of operation control informationNAKAZATO YASUSHI·Filed 2011·Granted May 8, 2012·0 cites·10 claims
- 4255US7289746B2Charging device, process cartridge, and image forming apparatusRICOH KK·Filed 2004·Granted Oct 30, 2007·5 cites·11 claims
- 4354US10474056B2Image forming apparatusUEMATSU YUUICHIROH·Filed 2018·Granted Nov 12, 2019·0 cites·10 claims
- 4452US2010033743A1Image forming apparatus, print media transport device, and image quality determining methodHIRAI SHUJI·Filed 2009·Application pending·0 cites
- 4549US8808008B2Rotatable connector deviceHIRAI SHUJI·Filed 2012·Granted Aug 19, 2014·1 cites·9 claims
- 4648US8983320B2Image forming apparatusSUZUKI SHINGO·Filed 2014·Granted Mar 17, 2015·0 cites·20 claims
- 4748US8693053B2Image forming apparatus and correction effect verification methodHIRAI SHUJI·Filed 2011·Granted Apr 8, 2014·0 cites·8 claims
- 4847US10401763B2Image forming apparatusRICOH CO LTD·Filed 2017·Granted Sep 3, 2019·0 cites·22 claims
- 4946US7903986B2Reuse 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 velocityRICOH CO LTD·Filed 2009·Granted Mar 8, 2011·0 cites·13 claims
- 5045US8818244B2Developing device and image forming apparatusHIRAYAMA YUSHI·Filed 2012·Granted Aug 26, 2014·0 cites·6 claims
Showing the top 50 of 66 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →