Inventor · disambiguated record
Masanori Kawasumi
Also filed as: KAWASUMI MASANORI
56 granted patents·11 pending applications·1,360 citations·filing 1995–2018
99Inventor score
Top patents by PatentIndex Score
67 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
- 0897US7272354B2Cleaning unit and image forming apparatus having multiple cleaning bladesRICOH KK·Filed 2006·Granted Sep 18, 2007·27 cites·46 claims
- 0996US7373101B2Method 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
- 1096US7313347B2Cleaning device, process cartridge, image forming apparatus and tonerRICOH KK·Filed 2005·Granted Dec 25, 2007·32 cites·31 claims
- 1195US7672605B2Transfer device and image forming apparatusRICOH KK·Filed 2007·Granted Mar 2, 2010·22 cites·5 claims
- 1295US7630659B2Method and apparatus for image forming capable of effectively performing a charging processRICOH KK·Filed 2006·Granted Dec 8, 2009·23 cites·15 claims
- 1395US7266324B2Charging device, and process cartridge and image forming apparatus using the charging deviceRICOH KK·Filed 2006·Granted Sep 4, 2007·18 cites·15 claims
- 1495US7076192B2Powder conveying device and image forming apparatus using the sameRICOH KK·Filed 2003·Granted Jul 11, 2006·55 cites·16 claims
- 1594US7398038B2Image forming apparatus using a toner container and a process cartridgeRICOH KK·Filed 2003·Granted Jul 8, 2008·47 cites·23 claims
- 1694US7024133B2Image 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
- 1793US7925188B2Development device, process cartridge, and image forming apparatus using the development deviceRICOH CO LTD·Filed 2008·Granted Apr 12, 2011·20 cites·14 claims
- 1893US7826786B2Image forming apparatus, lubricant applying device, transfer device, process cartridge, and tonerRICOH KK·Filed 2005·Granted Nov 2, 2010·17 cites·13 claims
- 1993US7292816B2Method 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
- 2092US8385793B2Image forming apparatus preventing gaps between a conveyor belt and transfer sheetRICOH CO LTD·Filed 2010·Granted Feb 26, 2013·8 cites·12 claims
- 2192US7493075B2Cleaning device, process cartridge and image forming apparatusRICOH KK·Filed 2007·Granted Feb 17, 2009·13 cites·15 claims
- 2292US7477862B2Charged device, cleaning device, process cartridge, toner, and image-forming device that uses theseRICOH KK·Filed 2005·Granted Jan 13, 2009·13 cites·15 claims
- 2392US7218877B2Charging device, and process cartridge and image forming apparatus including the charging device using the sameRICOH KK·Filed 2006·Granted May 15, 2007·12 cites·16 claims
- 2491US7136610B2Image 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
- 2591US7062194B2Charging device, and process cartridge and image forming apparatus including the charging deviceRICOH KK·Filed 2004·Granted Jun 13, 2006·31 cites·17 claims
- 2691US6807390B2Image forming apparatusRICOH KK·Filed 2003·Granted Oct 19, 2004·37 cites·10 claims
- 2790US8000627B2Charging device, process cartridge, image forming apparatus, and tonerRICOH CO LTD·Filed 2005·Granted Aug 16, 2011·10 cites·41 claims
- 2889US7672635B2Method 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
- 2989US7333744B2Image 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
- 3089US7212767B2Image forming apparatus and process cartridge removably mounted theretoRICOH KK·Filed 2003·Granted May 1, 2007·27 cites·28 claims
- 3189US7149465B2Cleaning unit, process cartridge, image forming apparatus, and tonerRICOH KK·Filed 2004·Granted Dec 12, 2006·26 cites·22 claims
- 3289US7110696B2Cleaning unit, process cartridge, and image forming apparatusRICOH KK·Filed 2003·Granted Sep 19, 2006·27 cites·47 claims
- 3388US8428488B2Charging device, process cartridge, image forming apparatus, and tonerMIZUISHI HARUJI·Filed 2011·Granted Apr 23, 2013·7 cites·17 claims
- 3488US7139504B2Charging device, and process cartridge and image forming apparatus using the charging deviceRICOH KK·Filed 2004·Granted Nov 21, 2006·24 cites·15 claims
- 3587US8422897B2Image forming apparatusSUZUKI HIROKATSU·Filed 2010·Granted Apr 16, 2013·6 cites·9 claims
- 3687US7386257B2Imaging apparatus, and toner and process cartridge used in the imaging apparatusRICOH KK·Filed 2006·Granted Jun 10, 2008·7 cites·3 claims
- 3786US7680429B2Charging device including charging roller and cleaning rollerRICOH KK·Filed 2008·Granted Mar 16, 2010·7 cites·19 claims
- 3886US7228099B2Cleaning device for cleaning a surface of an image support bodyRICOH KK·Filed 2004·Granted Jun 5, 2007·21 cites·28 claims
- 3985US7050741B2Imaging apparatus, and toner and process cartridge used in the imaging apparatusRICOH KK·Filed 2004·Granted May 23, 2006·20 cites·16 claims
- 4084US10732542B2Image forming apparatus for increase of color toner in a color toner image in a special operationTANAKA MASATO·Filed 2018·Granted Aug 4, 2020·2 cites·32 claims
- 4181US7477856B2Method and apparatus for image forming capable of effectively preventing resonance of frequenciesRICOH KK·Filed 2005·Granted Jan 13, 2009·6 cites·17 claims
- 4281US6807395B2Computer assisted learning system, storage server used for computer assisted learning system and computer readable media recording program used in storage serverTOSHIBA TEC KK·Filed 2002·Granted Oct 19, 2004·26 cites·10 claims
- 4378US8433216B2Image forming apparatusISHIKAKE SATORU·Filed 2011·Granted Apr 30, 2013·3 cites·20 claims
- 4476US7539451B2Image forming apparatus and tonerRICOH KK·Filed 2005·Granted May 26, 2009·5 cites·10 claims
- 4575US7295796B1Image forming apparatus having a temporary toner holding device and a toner collecting deviceRICOH KK·Filed 2003·Granted Nov 13, 2007·14 cites·37 claims
- 4673US7085528B2Cleaning unit, process cartridge, and image forming apparatusRICOH KK·Filed 2003·Granted Aug 1, 2006·12 cites·34 claims
- 4772US7430377B2Image forming apparatus and process cartridge having a detachable unit body having a lubricant applying unit and image carrier mounted thereonRICOH KK·Filed 2004·Granted Sep 30, 2008·12 cites·26 claims
- 4872US7003255B2Image forming apparatus and process cartridgeRICOH KK·Filed 2003·Granted Feb 21, 2006·13 cites·36 claims
- 4970US7100158B2Program management apparatus, program management system, and program management methodTOSHIBA TEC KK·Filed 2002·Granted Aug 29, 2006·19 cites·2 claims
- 5070US7065316B2Cleaning unit, process cartridge, image forming apparatus, and tonerRICOH KK·Filed 2003·Granted Jun 20, 2006·10 cites·42 claims
Showing the top 50 of 67 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →