Inventor · disambiguated record
Nobuo Kuwabara
Also filed as: KUWABARA NOBUO
47 granted patents·7 pending applications·396 citations·filing 1994–2024
98Inventor score
Top patents by PatentIndex Score
54 records- 0195US5835822AImage-forming apparatus comprising a process unitFUJITSU LTD·Filed 1996·Granted Nov 10, 1998·61 cites·15 claims
- 0294US7460810B2Image forming apparatus having a cleaning roller for a charging roller of the apparatusRICOH KK·Filed 2005·Granted Dec 2, 2008·17 cites·38 claims
- 0394US7024133B2Image 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
- 0493US8380115B2Lubricant applicator, image forming apparatus, and process cartridgeRICOH CO LTD·Filed 2010·Granted Feb 19, 2013·9 cites·7 claims
- 0592US7343132B2Image forming apparatus and process cartridge including sealable lubricating deviceRICOH KK·Filed 2005·Granted Mar 11, 2008·14 cites·20 claims
- 0691US7305203B2Image forming apparatus including a process cartridge formed with a holeRICOH KK·Filed 2005·Granted Dec 4, 2007·13 cites·7 claims
- 0791US7136610B2Image 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
- 0891US6377765B1Means for independently changing a latent image carrier unit and a developing unit in an image forming unitFUJITSU LTD·Filed 2000·Granted Apr 23, 2002·49 cites·24 claims
- 0988US10042314B2Cleaning device, process cartridge incorporating the cleaning device, and image forming apparatus incorporating the cleaning deviceTOMITA DAISUKE·Filed 2017·Granted Aug 7, 2018·4 cites·14 claims
- 1088US8712261B2Lubricant supplying device, process cartridge, and image forming apparatusKUDO NORIO·Filed 2012·Granted Apr 29, 2014·5 cites·13 claims
- 1184US8254823B2Waste toner storage unit and image forming apparatus using sameNAGASHIMA HIROYUKI·Filed 2008·Granted Aug 28, 2012·7 cites·25 claims
- 1282US9696648B2Image forming apparatusMAEHATA YASUHIRO·Filed 2016·Granted Jul 4, 2017·2 cites·10 claims
- 1382US8428475B2Waste toner container and image forming apparatus incorporating sameTOMITA DAISUKE·Filed 2010·Granted Apr 23, 2013·3 cites·7 claims
- 1482US7953363B2Lubricant applicator and image forming apparatus including sameRICOH CO LTD·Filed 2009·Granted May 31, 2011·11 cites·19 claims
- 1580US9367021B2Image forming apparatusISHIZUKA YUSUKE·Filed 2015·Granted Jun 14, 2016·2 cites·20 claims
- 1678US8204423B2Cleaning device with accumulation prevention, process cartridge, and image forming apparatus including sameHATORI SATOSHI·Filed 2009·Granted Jun 19, 2012·5 cites·3 claims
- 1778US7844198B2Electrophotographic photoreceptor, photoreceptor supporting device, imaging device and process cartridgeRICOH CO LTD·Filed 2009·Granted Nov 30, 2010·5 cites·7 claims
- 1878US6128463AImage forming deviceFUJITSU LTD·Filed 1997·Granted Oct 3, 2000·27 cites·21 claims
- 1978US5852757AElectrophotographic image forming apparatus having a device for recovering residual tonerFUJITSU LTD·Filed 1996·Granted Dec 22, 1998·32 cites·18 claims
- 2077US9158267B2Waste-toner conveyance device and image forming apparatusRICOH CO LTD·Filed 2014·Granted Oct 13, 2015·2 cites·8 claims
- 2175US12498664B2Intermediate transfer unit and image forming apparatusKUWABARA NOBUO·Filed 2024·Granted Dec 16, 2025·0 cites·6 claims
- 2274US9798288B2Image forming apparatus which controls the rotation speed of a lubricant supply rollerMAEHATA YASUHIRO·Filed 2016·Granted Oct 24, 2017·1 cites·19 claims
- 2374US8725009B2Image forming apparatusTOMITA DAISUKE·Filed 2011·Granted May 13, 2014·2 cites·18 claims
- 2474US7483648B2Process cartridge and image forming apparatus using the sameRICOH KK·Filed 2005·Granted Jan 27, 2009·5 cites·20 claims
- 2570US9128452B2Lubricant supply system, image forming apparatus, and process cartridgeHATORI SATOSHI·Filed 2014·Granted Sep 8, 2015·1 cites·20 claims
- 2670US8041280B2Lubricant applying device, process cartridge, and image forming apparatusRICOH CO LTD·Filed 2009·Granted Oct 18, 2011·3 cites·10 claims
- 2769US9383715B2Lubricant supplying device, process cartridge and image forming apparatusHONJOH KENJI·Filed 2015·Granted Jul 5, 2016·1 cites·20 claims
- 2869US8718530B2Lubricant supply device, process cartridge, and image forming apparatusKUDO NORIO·Filed 2012·Granted May 6, 2014·1 cites·13 claims
- 2968US8315535B2Cleaning unit, process cartridge incorporating same, and image forming apparatus incorporating the cleaning unitSHINTANI TAKESHI·Filed 2009·Granted Nov 20, 2012·3 cites·20 claims
- 3067US8913923B2Image forming apparatus with neutralizer and image forming methodKOSUGE AKIO·Filed 2012·Granted Dec 16, 2014·1 cites·8 claims
- 3167US8761654B2Cleaning device, process cartridge, and image forming apparatusKAWAHARA SHINICHI·Filed 2011·Granted Jun 24, 2014·1 cites·8 claims
- 3264US7603053B2Image forming apparatusRICOH KK·Filed 2007·Granted Oct 13, 2009·2 cites·8 claims
- 3362US5678143AImage forming apparatus for collecting residual toner from a drum using an AC voltageFUJITSU LTD·Filed 1994·Granted Oct 14, 1997·12 cites·19 claims
- 3461US12235604B2Image forming apparatus with a door on a body and cover inside the doorKUWABARA NOBUO·Filed 2023·Granted Feb 25, 2025·0 cites·17 claims
- 3559US9207625B2Lubricant supply device, process unit, image forming apparatus, and process unit manufacturing methodGOTOH RYOHTA·Filed 2014·Granted Dec 8, 2015·1 cites·20 claims
- 3657US7953362B2Image forming apparatus, process cartridge, and lubricant applicatorRICOH CO LTD·Filed 2007·Granted May 31, 2011·1 cites·16 claims
- 3754US10481515B2Charging device, process cartridge, and image forming apparatusKUWABARA NOBUO·Filed 2019·Granted Nov 19, 2019·0 cites·16 claims
- 3853US2010215397A1Image forming apparatusSAMPE ATSUSHI·Filed 2010·Application pending·0 cites
- 3953US2025036045A1Tension roller assembly, belt unit, and image forming apparatusKUWABARA NOBUO·Filed 2024·Application pending·0 cites
- 4053US2010129113A1Image forming apparatusSAMPE ATSUSHI·Filed 2010·Application pending·0 cites
- 4152US11256202B2Snap ring, rotator device, fixing device, and image forming apparatusWATANABE YOHHEI·Filed 2020·Granted Feb 22, 2022·0 cites·20 claims
- 4248US8090293B2Process cartridge and image forming apparatus employing sameARAI YUJI·Filed 2009·Granted Jan 3, 2012·0 cites·13 claims
- 4347US2006008296A1Image forming apparatusSAMPE ATSUSHI·Filed 2005·Application pending·0 cites
- 4446US9958823B2Device including roller, and image forming apparatus and process cartridge incorporating sameTOMITA DAISUKE·Filed 2016·Granted May 1, 2018·0 cites·20 claims
- 4543US8457541B2Image forming apparatusKOSUGE AKIO·Filed 2009·Granted Jun 4, 2013·0 cites·16 claims
- 4642US8185032B2Used toner collection device and image forming apparatusONO HIROSHI·Filed 2008·Granted May 22, 2012·0 cites·5 claims
- 4741US5778285AImage forming apparatus for collecting residual toner from a drum using an AC voltageFUJITSU LTD·Filed 1997·Granted Jul 7, 1998·5 cites·6 claims
- 4839US2007122217A1Image forming apparatus & associated method of applying a lubricantNAGASHIMA HIROYUKI·Filed 2006·Application pending·0 cites
- 4939US2009022504A1Image forming apparatus, image carrier, and process cartridgeKUWABARA NOBUO·Filed 2008·Application pending·0 cites
- 5038US8958719B2Image forming apparatus having replaceable modulesKUWABARA NOBUO·Filed 2012·Granted Feb 17, 2015·0 cites·7 claims
Showing the top 50 of 54 patent records by PatentIndex Score.
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