Inventor
SATO MASUMI
JP63 patents
Patents
50 patentsUS6628908B2Sep 30, 2003
Toner supply unit and image forming apparatus
RICOH KK175 citations99
US6591077B2Jul 8, 2003
Image forming apparatus and toner container therefor
RICOH KK143 citations99
US6507720B2Jan 14, 2003
Color image forming apparatus and toner replenishing apparatus each including plural toner containers received in receiving member of setting part and toner containers therefor
RICOH KK209 citations99
US6393241B1May 21, 2002
Nozzle having an end portion capable of penetrating into a toner discharging portion included in a toner container that stores powdery toner
RICOH KK181 citations99
US6567637B2May 20, 2003
Apparatus and method for replenishing a developing device with toner while suppressing toner remaining
RICOH KK105 citations98
US6505022B2Jan 7, 2003
Image forming apparatus having protective layer on the surface of image bearing member to avoid adhesion of film of additives to image bearing member
RICOH KK110 citations98
US6501913B2Dec 31, 2002
Container, its support structure, and image formation apparatus
RICOH KK100 citations98
US7130558B2Oct 31, 2006
Toner supply unit and image forming apparatus
RICOH KK32 citations96
US6898407B2May 24, 2005
Desktop color image forming apparatus and method of making the same
RICOH KK61 citations96
US6748190B2Jun 8, 2004
Apparatus and method for replenishing a developing device with toner while suppressing toner remaining
RICOH KK42 citations96
US6567643B2May 20, 2003
Apparatuses for color image formation, tandem color image formation and image formation
RICOH KK38 citations96
US5946529AAug 31, 1999
Image forming apparatus using a roller type charging system
RICOH KK53 citations96
US5878317AMar 2, 1999
Electrophotographic method and apparatus including a toner recycle feature
RICOH KK85 citations96
US5799229AAug 25, 1998
Toner spreading device for a charging roller of an image forming apparatus
RICOH KK69 citations96
US6546219B2Apr 8, 2003
Method and apparatus for performing a charging process on an image carrying device
RICOH KK70 citations95
US5400123AMar 21, 1995
Image forming apparatus capable of erasing an image recorded in a sheet
RICOH KK102 citations95
US6470161B2Oct 22, 2002
Apparatus for minimizing toner contamination on an image formation member
RICOH KK65 citations94
US5659843AAug 19, 1997
Image transferring device for image forming equipment
RICOH KK61 citations94
US7209689B2Apr 24, 2007
Toner supply unit and image forming apparatus
RICOH KK20 citations93
US7088945B2Aug 8, 2006
Toner supply unit and image forming apparatus
RICOH KK13 citations93
US6416176B1Jul 9, 2002
Ink-jet printing system having an improved sheet transport mechanism
RICOH KK33 citations93
US6263175B1Jul 17, 2001
Image forming apparatus including a charging device with a cleaning member
RICOH KK22 citations93
US7263309B2Aug 28, 2007
Desktop color image forming apparatus and method of making the same
RICOH KK15 citations92
US6973283B2Dec 6, 2005
Color image forming apparatus, and toner replenishing apparatus
RICOH KK20 citations92
US6778797B2Aug 17, 2004
Charging roller having elastic member
RICOH KK26 citations92
US6719469B2Apr 13, 2004
Ink jet recording apparatus capable of performing a duplex print operation
RICOH KK33 citations92
US6519428B1Feb 11, 2003
Image forming apparatus having mixed toner consumption mode
RICOH KK44 citations92
US6366754B1Apr 2, 2002
Color image forming apparatus with toner recycling
RICOH KK44 citations92
US6334039B1Dec 25, 2001
Method and apparatus for image forming apparatus capable of accurately detecting toner image patterns
RICOH KK51 citations92
US6088551AJul 11, 2000
Charging device for image forming apparatus
RICOH KK28 citations92
US5719684AFeb 17, 1998
Image forming apparatus having an endless conveying and transferring belt with an interrupt control
RICOH KK26 citations92
US5144337ASep 1, 1992
Image forming apparatus capable of forming an image by dots having various diameters
RICOH KK27 citations91
US7356290B2Apr 8, 2008
Toner supply unit and image forming apparatus
RICOH KK9 citations84
US7333749B2Feb 19, 2008
Desktop color image forming apparatus and method of making the same
RICOH KK10 citations84
US7289748B2Oct 30, 2007
Apparatus and method for replenishing a developing device with toner while suppressing toner remaining
RICOH KK10 citations84
US7218880B2May 15, 2007
Apparatus and method for replenishing a developing device with toner while suppressing toner remaining
RICOH KK10 citations84
US6801749B2Oct 5, 2004
Apparatuses for color image formation, tandem color image formation and image formation
RICOH KK12 citations82
US7542697B2Jun 2, 2009
Toner supply unit and image forming apparatus
RICOH KK7 citations74
US7212764B2May 1, 2007
Color image forming apparatus, and toner replenishing apparatus
RICOH KK7 citations74
US6785504B2Aug 31, 2004
Apparatuses for color image formation, tandem color image formation and image formation
RICOH KK5 citations74
US6766137B2Jul 20, 2004
Apparatuses for color image formation, tandem color image formation and image formation
RICOH KK4 citations74
US6104419AAug 15, 2000
Image forming apparatus with a writing laser power control
RICOH KK8 citations74
US5296877AMar 22, 1994
Multicolor image forming method and apparatus therefor
RICOH KK12 citations74
US7344615B2Mar 18, 2008
Method and apparatus for performing a charging process on an image carrying device
RICOH KK5 citations73
US7344326B2Mar 18, 2008
Ink jet recording apparatus capable of performing a duplex print operation
RICOH KK5 citations73
US6977022B2Dec 20, 2005
Method and apparatus for performing a charging process on an image carrying device
RICOH KK11 citations73
US7606521B2Oct 20, 2009
Desktop color image forming apparatus and method of making the same
RICOH KK3 citations63
US7436417B2Oct 14, 2008
Color image forming apparatus, and toner replenishing apparatus
RICOH KK2 citations63
US7406283B2Jul 29, 2008
Desktop color image forming apparatus and method of making the same
RICOH KK3 citations63
US7079796B2Jul 18, 2006
Color image forming apparatus with toner recycling mechanism
RICOH KK2 citations63
Showing the top 50 of 63 patents by PatentIndex Score.