Inventor · disambiguated record
Yuji Arai
Also filed as: ARAI YUJI
206 granted patents·38 pending applications·2,387 citations·filing 1976–2023
99Inventor score
Files withRICOH KK39NIPPON STEEL CORP29NIPPON STEEL & SUMITOMO METAL CORP24ARAI YUJI20TAIYO YUDEN KK17
Top patents by PatentIndex Score
244 records- 0199US8195070B2Developer container, developer supplying device, and image forming apparatusHOSOKAWA HIROSHI·Filed 2011·Granted Jun 5, 2012·47 cites·12 claims
- 0299US8005406B2Developer container, developer supplying device, and image forming apparatusRICOH CO LTD·Filed 2010·Granted Aug 23, 2011·60 cites·18 claims
- 0399US7835673B2Developer container, developer supplying device, and image forming apparatusRICOH CO LTD·Filed 2008·Granted Nov 16, 2010·58 cites·28 claims
- 0499US7697870B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2009·Granted Apr 13, 2010·54 cites·26 claims
- 0599US7519317B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2007·Granted Apr 14, 2009·72 cites·25 claims
- 0699US7480476B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2007·Granted Jan 20, 2009·115 cites·20 claims
- 0799US7321744B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2004·Granted Jan 22, 2008·111 cites·49 claims
- 0899US7072602B2Image forming apparatus and image forming unitRICOH KK·Filed 2004·Granted Jul 4, 2006·122 cites·20 claims
- 0998US6937838B2Waste toner collecting device, and image forming apparatus including the waste toner collecting deviceRICOH KK·Filed 2003·Granted Aug 30, 2005·89 cites·42 claims
- 1097US8317946B2Seamless steel pipe and method for manufacturing the sameARAI YUJI·Filed 2011·Granted Nov 27, 2012·24 cites·5 claims
- 1197US5090009AOptical information recording mediumTAIYO YUDEN KK·Filed 1989·Granted Feb 18, 1992·96 cites·9 claims
- 1296US7727463B2Steel pipe for an airbag systemSUMITOMO METAL IND·Filed 2005·Granted Jun 1, 2010·14 cites·12 claims
- 1396US7373101B2Method and apparatus for image forming and effectively applying lubricant to an image bearing memberRICOH KK·Filed 2005·Granted May 13, 2008·24 cites·34 claims
- 1496US7313347B2Cleaning device, process cartridge, image forming apparatus and tonerRICOH KK·Filed 2005·Granted Dec 25, 2007·32 cites·31 claims
- 1596US7162189B2Method and apparatus of image forming and process cartridge included in the apparatusRICOH KK·Filed 2004·Granted Jan 9, 2007·53 cites·43 claims
- 1696US4940618AOptical information recording mediumTAIYO YUDEN KK·Filed 1989·Granted Jul 10, 1990·72 cites·8 claims
- 1795US7184684B2Image forming apparatus, process cartridge, and waste toner recovery deviceRICOH KK·Filed 2005·Granted Feb 27, 2007·16 cites·24 claims
- 1895US7076192B2Powder conveying device and image forming apparatus using the sameRICOH KK·Filed 2003·Granted Jul 11, 2006·55 cites·16 claims
- 1994US8725038B2Belt assembly, fixing device, and image forming apparatus incorporating sameYAMAGUCHI YOSHIKI·Filed 2011·Granted May 13, 2014·10 cites·18 claims
- 2094US7398038B2Image forming apparatus using a toner container and a process cartridgeRICOH KK·Filed 2003·Granted Jul 8, 2008·47 cites·23 claims
- 2194US7292817B2Image forming apparatus, process cartridge, and waste toner recovery deviceRICOH KK·Filed 2006·Granted Nov 6, 2007·15 cites·8 claims
- 2294US7146122B2Image forming apparatus and image forming unitRICOH KK·Filed 2006·Granted Dec 5, 2006·15 cites·6 claims
- 2394US7024133B2Image forming apparatus using a user installable process cartridge, a method of arranging the process cartridge, and the process cartridge itselfRICOH KK·Filed 2003·Granted Apr 4, 2006·50 cites·51 claims
- 2494US6975830B2Image forming apparatus, process cartridge, and waste toner recovery deviceRICOH KK·Filed 2003·Granted Dec 13, 2005·37 cites·17 claims
- 2594US6615013B2Powder classifying device and image forming apparatus having the powder classifying deviceRICOH KK·Filed 2001·Granted Sep 2, 2003·51 cites·43 claims
- 2693US9727011B2Image forming apparatus and image forming methodIKEBUCHI YUTAKA·Filed 2016·Granted Aug 8, 2017·5 cites·7 claims
- 2793US9448514B2Image forming apparatus and image forming methodIKEBUCHI YUTAKA·Filed 2014·Granted Sep 20, 2016·7 cites·10 claims
- 2893US7826786B2Image forming apparatus, lubricant applying device, transfer device, process cartridge, and tonerRICOH KK·Filed 2005·Granted Nov 2, 2010·17 cites·13 claims
- 2993US7292816B2Method and apparatus for electrophotographic image forming capable of effectively removing residual toner, a cleaning mechanism used therein, a process cartridge including the cleaning mechanism used in the apparatus, and toner used in the apparatusRICOH KK·Filed 2005·Granted Nov 6, 2007·16 cites·52 claims
- 3092US11155893B2Steel material suitable for use in sour environmentNIPPON STEEL CORP·Filed 2019·Granted Oct 26, 2021·2 cites·7 claims
- 3192US9046838B2Fixing device and image forming apparatusARAI YUJI·Filed 2013·Granted Jun 2, 2015·6 cites·23 claims
- 3292US7477862B2Charged device, cleaning device, process cartridge, toner, and image-forming device that uses theseRICOH KK·Filed 2005·Granted Jan 13, 2009·13 cites·15 claims
- 3391US7136610B2Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itselfRICOH KK·Filed 2004·Granted Nov 14, 2006·38 cites·18 claims
- 3491US5705247AOptical information medium and method for fabricating the sameTAIYU YUDEN CO LTD·Filed 1996·Granted Jan 6, 1998·79 cites·15 claims
- 3590US8000627B2Charging device, process cartridge, image forming apparatus, and tonerRICOH CO LTD·Filed 2005·Granted Aug 16, 2011·10 cites·41 claims
- 3689US8655211B2Fixing device and image forming apparatus incorporating sameFUJIMOTO IPPEI·Filed 2011·Granted Feb 18, 2014·5 cites·16 claims
- 3789US7672635B2Method and apparatus for image forming and effectively applying lubricant to an image bearing memberRICOH KK·Filed 2008·Granted Mar 2, 2010·8 cites·18 claims
- 3889US7333744B2Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltageRICOH KK·Filed 2005·Granted Feb 19, 2008·11 cites·15 claims
- 3989US7212767B2Image forming apparatus and process cartridge removably mounted theretoRICOH KK·Filed 2003·Granted May 1, 2007·27 cites·28 claims
- 4089US7149465B2Cleaning unit, process cartridge, image forming apparatus, and tonerRICOH KK·Filed 2004·Granted Dec 12, 2006·26 cites·22 claims
- 4189US4990388AOptical information recording mediumTAIYO YUDEN KK·Filed 1989·Granted Feb 5, 1991·52 cites·11 claims
- 4288US8428488B2Charging device, process cartridge, image forming apparatus, and tonerMIZUISHI HARUJI·Filed 2011·Granted Apr 23, 2013·7 cites·17 claims
- 4388US7316143B2Seamless steel tubes and method for producing the sameSUMITOMO METAL IND·Filed 2005·Granted Jan 8, 2008·6 cites·8 claims
- 4487US10514564B2Display unitSONY CORP·Filed 2015·Granted Dec 24, 2019·8 cites·13 claims
- 4587US9599940B2Fixing device with nip forming member having a high thermal-conductive layer with a low thermal conductive portionYAMANO MOTOYOSHI·Filed 2015·Granted Mar 21, 2017·4 cites·16 claims
- 4687US9389550B2Fixing device, image forming apparatus, and fixing methodSAITO KAZUYA·Filed 2014·Granted Jul 12, 2016·4 cites·20 claims
- 4787US7062207B2Powder transport apparatus and image forming apparatus that can stabilize replenishment of powderRICOH KK·Filed 2004·Granted Jun 13, 2006·26 cites·24 claims
- 4887US5470691AOptical information mediumTAIYO YUDEN KK·Filed 1994·Granted Nov 28, 1995·34 cites·15 claims
- 4987US5020048AOptical information recording medium having a protective film which can be strippedTAIYO YUDEN KK·Filed 1989·Granted May 28, 1991·33 cites·13 claims
- 5086US10443114B2Steel material and oil-well steel pipeNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted Oct 15, 2019·1 cites·17 claims
Showing the top 50 of 244 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →