Inventor · disambiguated record
Kazunari Murayama
Also filed as: MURAYAMA KAZUNARI
70 granted patents·3 pending applications·4,287 citations·filing 1997–2025
99Inventor score
Technology areasG03G
Top patents by PatentIndex Score
73 records- 0199US8688003B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2012·Granted Apr 1, 2014·30 cites·48 claims
- 0299US8369743B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2008·Granted Feb 5, 2013·57 cites·24 claims
- 0399US7869740B2Process cartridge and image forming apparatusCANON KK·Filed 2009·Granted Jan 11, 2011·37 cites·91 claims
- 0499US7509071B2Image forming apparatus detachably mounting a process cartridge having developing roller movable to contact and be spaced from a photosensitive drumCANON KK·Filed 2007·Granted Mar 24, 2009·92 cites·43 claims
- 0599US7340197B2Process cartridge, mounting mechanism therefor and electrophotographic image forming apparatusCANON KK·Filed 2005·Granted Mar 4, 2008·62 cites·16 claims
- 0699US7158735B2Process cartridge, mounting method of electrophotographic photosensitive drum and replacing method of the photosensitive drumCANON KK·Filed 2004·Granted Jan 2, 2007·123 cites·7 claims
- 0799US6980758B2Process cartridge, mounting mechanism therefor and electrophotographic image forming apparatusCANON KK·Filed 2003·Granted Dec 27, 2005·155 cites·16 claims
- 0899US6912365B2Process cartridge, unit, and electrophotographic image forming apparatusCANON KK·Filed 2002·Granted Jun 28, 2005·175 cites·22 claims
- 0999US6898391B2Process cartridge, electric contact and electrophotographic image forming apparatusCANON KK·Filed 2001·Granted May 24, 2005·163 cites·42 claims
- 1099US6823153B2Developing device and process cartridge comprising first and second sealing members and electrophotographic image forming apparatus comprising a developing device comprising first and second sealing membersCANON KK·Filed 2003·Granted Nov 23, 2004·167 cites·18 claims
- 1199US6714752B2Process cartridge, load producing member and electrophotographic image forming apparatusCANON KK·Filed 2001·Granted Mar 30, 2004·175 cites·27 claims
- 1299US6608980B2Electrophotographic image forming apparatus to which a process cartridge is detachably mountable and process cartridge comprising cartridge drum positioning portion or recessCANON KK·Filed 2000·Granted Aug 19, 2003·249 cites·26 claims
- 1399US6577831B1Electrophotographic image forming apparatus to which a process cartridge is detachably mountable and process cartridge having a supporting member for rotatably supporting a developing roller at a position away from the center of rotation thereofCANON KK·Filed 2000·Granted Jun 10, 2003·178 cites·16 claims
- 1499US6463233B2Process cartridge having first and second cartridge guiding portions and an electrophotographic image forming apparatus to which the process cartridge is attachedCANON KK·Filed 2001·Granted Oct 8, 2002·133 cites·16 claims
- 1599US6385416B1Space securing member, developing device, charging device and process cartridgeCANON KK·Filed 2000·Granted May 7, 2002·216 cites·13 claims
- 1698US8971760B2Process cartridge and image forming apparatusCANON KK·Filed 2013·Granted Mar 3, 2015·10 cites·30 claims
- 1798US7349649B2Process cartridge, positioning mechanism therefor and electrophotographic image forming apparatusCANON KK·Filed 2006·Granted Mar 25, 2008·48 cites·10 claims
- 1898US7346293B2Process cartridge having light guides and memory member, and electrophotographic image forming apparatus to which such cartridge is mountableCANON KK·Filed 2006·Granted Mar 18, 2008·39 cites·10 claims
- 1998US7162174B2Process cartridge having light guides and memory member, and electrophotographic image forming apparatus to which such cartridge is mountableCANON KK·Filed 2004·Granted Jan 9, 2007·81 cites·10 claims
- 2098US7127194B2Process cartridge, positioning mechanism therefor and electrophotographic image forming apparatusCANON KK·Filed 2003·Granted Oct 24, 2006·83 cites·16 claims
- 2198US7092658B2Driving force transmission mechanism, image forming apparatus equipped with such a mechanism, and process unit of such an apparatusCANON KK·Filed 2004·Granted Aug 15, 2006·137 cites·14 claims
- 2298US6978099B2Developing apparatus, process cartridge, and electrophotographic image forming apparatus including an elastic member preventing a gap between a developing agent carrier and a layer thickness limiter from changing, and an electrophotographic image forming apparatus detachably mounting such process cartridgeCANON KK·Filed 2003·Granted Dec 20, 2005·122 cites·12 claims
- 2398US6834175B2Developer agitating memberCANON KK·Filed 2003·Granted Dec 21, 2004·119 cites·17 claims
- 2498US6829455B2Driving force transmission mechanism, image forming apparatus equipped with such a mechanism, and process unit of such an apparatusCANON KK·Filed 2001·Granted Dec 7, 2004·160 cites·39 claims
- 2598US6442359B1Process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus comprising means for rotating a charging unit if first and second rotational directions and the apparatus mounting such a process cartridgeCANON KK·Filed 1999·Granted Aug 27, 2002·126 cites·16 claims
- 2698US6289189B1Process cartridge and electrophotographic image forming apparatus having a main assembly in which a cartridge coupling member is engageable with a main assembly coupling member to receive a driving forceCANON KK·Filed 1999·Granted Sep 11, 2001·143 cites·9 claims
- 2798US6157792AElectrophotographic apparatus having plural image forming modes, and a process cartridge applied to such electrophotographic apparatusCANON KK·Filed 1999·Granted Dec 5, 2000·122 cites·50 claims
- 2897US8588646B2Process cartridge and image forming apparatusYOSHIMURA AKIRA·Filed 2012·Granted Nov 19, 2013·11 cites·169 claims
- 2997US8583006B2Electrophotographic image forming apparatus and process cartridge with electrical contacts that urge developer roller to photosensitive drumMURAYAMA KAZUNARI·Filed 2012·Granted Nov 12, 2013·28 cites·4 claims
- 3097US8213828B2Electrophotographic image forming apparatus and process cartridge mounted thereto having contacts electrically connecting with an electrical contactMURAYAMA KAZUNARI·Filed 2007·Granted Jul 3, 2012·52 cites·17 claims
- 3197US8165494B2Process cartridge having a member with a force receiving end movable to a position away from a cartridge housingYOSHIMURA AKIRA·Filed 2010·Granted Apr 24, 2012·14 cites·61 claims
- 3296US8565639B2Process cartridge and image forming apparatusNITTANI SUSUMU·Filed 2011·Granted Oct 22, 2013·48 cites·10 claims
- 3396US7162181B2Remanufacturing method for process cartridgeCANON KK·Filed 2004·Granted Jan 9, 2007·74 cites·11 claims
- 3496US6990302B2Process cartridge and electrophotographic image forming apparatus regulating the positions of creases on a flexible member in accordance with pivotal movement of a support memberCANON KK·Filed 2003·Granted Jan 24, 2006·73 cites·8 claims
- 3596US6587660B2Developing apparatusCANON KK·Filed 2001·Granted Jul 1, 2003·62 cites·8 claims
- 3696US6404996B1Electrophotographic apparatus having plural image forming modes, and a process cartridge applied to such electrophotographic apparatusCANON KK·Filed 2000·Granted Jun 11, 2002·66 cites·20 claims
- 3795US11460802B2Process cartridge and image forming apparatusCANON KK·Filed 2021·Granted Oct 4, 2022·2 cites·13 claims
- 3895US10162304B2Process cartridge and image forming apparatusCANON KK·Filed 2017·Granted Dec 25, 2018·3 cites·12 claims
- 3995US7466939B2Electrophotographic image forming apparatus to which a plurality of process cartridges are detachably mountable by using a moving guide and an opening and closing memberCANON KK·Filed 2006·Granted Dec 16, 2008·21 cites·15 claims
- 4095US6266503B1Method for attaching electrostatic photosensitive drum method for replacing electrophotographic photosensitive drum and process cartridgeCANON KK·Filed 1999·Granted Jul 24, 2001·82 cites·16 claims
- 4194US10234820B2Process cartridge and image forming apparatusCANON KK·Filed 2018·Granted Mar 19, 2019·2 cites·20 claims
- 4294US6463242B1Developing device, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2000·Granted Oct 8, 2002·49 cites·19 claims
- 4394US6298217B1Cleaning apparatus and process cartridgeCANON KK·Filed 1997·Granted Oct 2, 2001·70 cites·101 claims
- 4493US11215949B2Process cartridge and image forming apparatusCANON KK·Filed 2020·Granted Jan 4, 2022·2 cites·27 claims
- 4593US7035573B2Developing apparatus having developer carrying screw with a plurality of inclination anglesCANON KK·Filed 2003·Granted Apr 25, 2006·44 cites·18 claims
- 4693US6131011AMethod of adjusting the mounting of cleaning member, process cartridge and image forming apparatusCANON KK·Filed 1999·Granted Oct 10, 2000·62 cites·6 claims
- 4793US2024427282A1Process cartridge and image forming apparatusCANON KK·Filed 2024·Application pending·0 cites
- 4892US11579563B2Process cartridge and image forming apparatusCANON KK·Filed 2021·Granted Feb 14, 2023·1 cites·13 claims
- 4992US10761478B2Process cartridge and image forming apparatusCANON KK·Filed 2019·Granted Sep 1, 2020·1 cites·21 claims
- 5092US9829856B2Process cartridge and image forming apparatusCANON KK·Filed 2016·Granted Nov 28, 2017·2 cites·1 claims
Showing the top 50 of 73 patent records by PatentIndex Score.
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