Inventor · disambiguated record
Atsushi Numagami
Also filed as: NUMAGAMI ATSUSHI
103 granted patents·2 pending applications·8,811 citations·filing 1992–2025
99Inventor score
Top patents by PatentIndex Score
105 records- 0199US7869740B2Process cartridge and image forming apparatusCANON KK·Filed 2009·Granted Jan 11, 2011·37 cites·91 claims
- 0299US7509071B2Image 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
- 0399US7457566B2Electrophotosensitive drum having non-circular twisted projection with electroconductive member thereon, process cartridge having such drum, and electrophotographic image forming apparatus to which the cartridge is detachably mountableCANON KK·Filed 2005·Granted Nov 25, 2008·68 cites·7 claims
- 0499US7366452B2Developer supply container and electrophotographic image forming apparatusCANON KK·Filed 2006·Granted Apr 29, 2008·105 cites·13 claims
- 0599US7315710B2Electrophotographic photosensitive drum supporting apparatus, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2006·Granted Jan 1, 2008·140 cites·21 claims
- 0699US7209682B2Electrophotographic photosensitive drum, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2004·Granted Apr 24, 2007·148 cites·11 claims
- 0799US7184690B2Electrophotographic photosensitive drum supporting apparatus, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2004·Granted Feb 27, 2007·182 cites·15 claims
- 0899US7174122B2Developer supply container and electrophotographic image forming apparatusCANON KK·Filed 2005·Granted Feb 6, 2007·113 cites·12 claims
- 0999US7158736B2Process cartridge having first and second rotatably coupled frames and electrophotographic image forming apparatus mounting such process cartridgeCANON KK·Filed 2004·Granted Jan 2, 2007·209 cites·8 claims
- 1099US7003247B2Electrophotographic photosensitive drum, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2004·Granted Feb 21, 2006·154 cites·2 claims
- 1199US6954601B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2003·Granted Oct 11, 2005·156 cites·15 claims
- 1299US6954600B2Electric contact member applying voltage to charger, process cartridge, and image forming apparatusCANON KK·Filed 2003·Granted Oct 11, 2005·120 cites·28 claims
- 1399US6898391B2Process cartridge, electric contact and electrophotographic image forming apparatusCANON KK·Filed 2001·Granted May 24, 2005·163 cites·42 claims
- 1499US6714752B2Process cartridge, load producing member and electrophotographic image forming apparatusCANON KK·Filed 2001·Granted Mar 30, 2004·175 cites·27 claims
- 1599US6608980B2Electrophotographic 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
- 1699US6577831B1Electrophotographic 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
- 1799US6463233B2Process 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
- 1899US6385416B1Space securing member, developing device, charging device and process cartridgeCANON KK·Filed 2000·Granted May 7, 2002·216 cites·13 claims
- 1999US6330409B1Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2000·Granted Dec 11, 2001·107 cites·10 claims
- 2099US6131007ADeveloping device, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 1998·Granted Oct 10, 2000·183 cites·31 claims
- 2199US5966566ARecycle method for process cartridge and image forming apparatusCANON KK·Filed 1997·Granted Oct 12, 1999·235 cites·33 claims
- 2299US5920753AProcess cartridge and electrophotographic image forming apparatusCANON KK·Filed 1997·Granted Jul 6, 1999·277 cites·23 claims
- 2399US5585895ADeveloping device and process cartridge with itCANON KK·Filed 1994·Granted Dec 17, 1996·143 cites·8 claims
- 2499US5543898AProcess cartridge, method for assembling process cartridge and image forming apparatusCANON KK·Filed 1994·Granted Aug 6, 1996·182 cites·83 claims
- 2599US5500714AProcess cartridge, method for assembling process cartridge and image forming appararatusCANON KK·Filed 1994·Granted Mar 19, 1996·200 cites·84 claims
- 2698US8971760B2Process cartridge and image forming apparatusCANON KK·Filed 2013·Granted Mar 3, 2015·10 cites·30 claims
- 2798US7440715B2Electrophotographic photosensitive drum, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2006·Granted Oct 21, 2008·46 cites·11 claims
- 2898US7212768B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2004·Granted May 1, 2007·140 cites·13 claims
- 2998US7092658B2Driving 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
- 3098US7062200B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2004·Granted Jun 13, 2006·115 cites·16 claims
- 3198US6978099B2Developing 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
- 3298US6970668B2Method of reproducing process cartridgeCANON KK·Filed 2003·Granted Nov 29, 2005·107 cites·14 claims
- 3398US6968146B1Developer supply container and electrophotographic image forming apparatusCANON KK·Filed 2003·Granted Nov 22, 2005·109 cites·11 claims
- 3498US6834175B2Developer agitating memberCANON KK·Filed 2003·Granted Dec 21, 2004·119 cites·17 claims
- 3598US6829455B2Driving 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
- 3698US6442359B1Process 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
- 3798US6289189B1Process 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
- 3898US6272299B1Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 1997·Granted Aug 7, 2001·190 cites·38 claims
- 3998US6169866B1Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 1997·Granted Jan 2, 2001·120 cites·54 claims
- 4098US6097909APhotosensitive drum mounting method, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 1997·Granted Aug 1, 2000·150 cites·43 claims
- 4198US6029032AProcess cartridge and electrophotographic image forming apparatusCANON KK·Filed 1997·Granted Feb 22, 2000·169 cites·81 claims
- 4298US6006058AProcess cartridge and electrophotographic image forming apparatus having an improved driving systemCANON KK·Filed 1997·Granted Dec 21, 1999·154 cites·61 claims
- 4398US5937239AProcess cartridge and electrophotographic image forming apparatusCANON KK·Filed 1996·Granted Aug 10, 1999·137 cites·37 claims
- 4498US5768658AElectrode member, developing apparatus, process cartridge and image forming apparatusCANON KK·Filed 1996·Granted Jun 16, 1998·195 cites·36 claims
- 4598US5689774AProcess cartridge and image forming apparatus using such a process cartridgeCANON KK·Filed 1996·Granted Nov 18, 1997·122 cites·27 claims
- 4697US8588646B2Process cartridge and image forming apparatusYOSHIMURA AKIRA·Filed 2012·Granted Nov 19, 2013·11 cites·169 claims
- 4797US8165494B2Process 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
- 4897US7158749B2Cleaning device, process cartridge, cleaning member and electrophotographic image forming apparatusCANON KK·Filed 2004·Granted Jan 2, 2007·72 cites·10 claims
- 4997US6246849B1Bearing, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 1997·Granted Jun 12, 2001·119 cites·61 claims
- 5097US6016413AAssembling method of process cartridge, assembling method and process cartridgeCANON KK·Filed 1997·Granted Jan 18, 2000·114 cites·16 claims
Showing the top 50 of 105 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →