Inventor
ISHIBASHI HITOSHI
JP60 patents
⚠️ This page may combine multiple inventors who share the name “ISHIBASHI HITOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
35 patentsUS6505022B2Jan 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
US6546219B2Apr 8, 2003
Method and apparatus for performing a charging process on an image carrying device
RICOH KK70 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
US7305195B2Dec 4, 2007
Image forming apparatus, method of calculating amount of toner transfer, methods of converting regular reflection output and diffuse reflection output, method of converting amount of toner transfer, apparatus for detecting amount of toner transfer, gradation pattern, and methods of controlling toner density and image density
RICOH KK13 citations93
US7139511B2Nov 21, 2006
Image forming apparatus, method of calculating amount of toner transfer, methods of converting regular reflection output and diffuse reflection output, method of converting amount of toner transfer, apparatus for detecting amount of toner transfer, gradation pattern, and methods of controlling toner density and image density
RICOH KK25 citations93
US5623330AApr 22, 1997
Image forming apparatus
RICOH KK45 citations93
US7616909B2Nov 10, 2009
Image forming apparatus and image forming method
RICOH KK21 citations92
US7260335B2Aug 21, 2007
Image-information detecting device and image forming apparatus
RICOH KK24 citations92
US7251420B2Jul 31, 2007
Method and apparatus for image forming capable of effectively detecting toner density
RICOH KK42 citations92
US7228081B2Jun 5, 2007
Method and apparatus for image forming capable of controlling image-forming process conditions
RICOH KK37 citations92
US7174124B2Feb 6, 2007
Tandem color image forming apparatus with an image transfer belt and backup roller
RICOH KK25 citations92
US6823149B2Nov 23, 2004
Image forming apparatus with variable speed transferring and fixing devices
RICOH KK43 citations92
US6778797B2Aug 17, 2004
Charging roller having elastic member
RICOH KK26 citations92
US6519428B1Feb 11, 2003
Image forming apparatus having mixed toner consumption mode
RICOH KK44 citations92
US6360065B1Mar 19, 2002
Method and apparatus for image forming capable of effectively generating a consistent charge potential
RICOH KK60 citations92
US5438401AAug 1, 1995
Multicolor image forming method and apparatus therefor
RICOH KK41 citations92
US7796902B2Sep 14, 2010
Image forming condition adjustment control for image forming apparatus
RICOH KK11 citations84
US7778560B2Aug 17, 2010
Image forming apparatus and method of adjusting charge bias
RICOH KK10 citations84
US7551866B2Jun 23, 2009
Image forming method and apparatus with improved conversion capability of amount of toner adhesion
RICOH KK8 citations84
US7548704B2Jun 16, 2009
Image forming apparatus effectively conducting a process control
RICOH KK8 citations84
US7493058B2Feb 17, 2009
Image forming apparatus and toner concentration controlling method
RICOH KK13 citations84
US7443535B2Oct 28, 2008
Misalignment correction pattern formation method and misalignment correction method
RICOH KK14 citations84
US7055928B2Jun 6, 2006
Alignment pattern detecting sensor, method of determining acceptance width of the alignment pattern detecting sensor, method of forming alignment pattern, and image forming apparatus
RICOH KK13 citations84
US7773899B2Aug 10, 2010
Image forming apparatus and method of calculating an amount of toner transfer by converting diffuse reflection output into a conversion value
RICOH KK7 citations74
US7672602B2Mar 2, 2010
Developing unit and image forming apparatus which forces consumption of toner
RICOH KK7 citations74
US7546046B2Jun 9, 2009
Method and apparatus for controlling an image density
RICOH KK5 citations74
US7526219B2Apr 28, 2009
Image forming apparatus and method of calculating an amount of toner transfer by converting regular reflection output into a normalized value
RICOH KK5 citations74
US7398026B2Jul 8, 2008
Method and apparatus for controlling an image density
RICOH KK7 citations74
US6782227B2Aug 24, 2004
Transfer device for setting a suitable recording medium adsorbing bias, and an image-forming apparatus including the transfer device
RICOH KK12 citations74
US7821677B2Oct 26, 2010
Method and apparatus for image forming capable of accurately detecting displacement of transfer images and image density
RICOH KK7 citations73
US7344615B2Mar 18, 2008
Method and apparatus for performing a charging process on an image carrying device
RICOH KK5 citations73
US6977022B2Dec 20, 2005
Method and apparatus for performing a charging process on an image carrying device
RICOH KK11 citations73
US7477856B2Jan 13, 2009
Method and apparatus for image forming capable of effectively preventing resonance of frequencies
RICOH KK6 citations63
US7438379B2Oct 21, 2008
Alignment pattern detecting sensor, method of determining acceptance width of the alignment pattern detecting sensor, method of forming alignment pattern, and image forming apparatus
RICOH KK5 citations63
RICOH CO LTD
6 patentsUS8045874B2Oct 25, 2011
Image forming apparatus and image density control method
RICOH CO LTD9 citations84
US7881629B2Feb 1, 2011
Image forming apparatus and image density control method
RICOH CO LTD11 citations84
US7962071B2Jun 14, 2011
Developing device and image forming apparatus using same
RICOH CO LTD8 citations83
US8027605B2Sep 27, 2011
Image forming apparatus and image density control method
RICOH CO LTD2 citations63
US8009997B2Aug 30, 2011
Toner replenishment determination device of an image forming apparatus
RICOH CO LTD2 citations63
US7929873B2Apr 19, 2011
Image forming apparatus and image density control method
RICOH CO LTD5 citations61
ISHIBASHI HITOSHI
3 patentsUS8279491B2Oct 2, 2012
Color image formation apparatus for forming a reference pattern with a plurality of lines having a black color as reference color and for correcting misalignment with respect to the reference pattern
ISHIBASHI HITOSHI8 citations83
US8155543B2Apr 10, 2012
Image forming apparatus capable of reducing a lengthy duration of an adjustment control
ISHIBASHI HITOSHI10 citations83
US8095025B2Jan 10, 2012
Image forming apparatus capable of efficient toner concentration control
ISHIBASHI HITOSHI7 citations83
HIRAYAMA YUSHI
3 patentsUS8311422B2Nov 13, 2012
Image forming apparatus having a first and second toner containers and a developing unit
HIRAYAMA YUSHI2 citations61
US8145100B2Mar 27, 2012
Process cartridge including developing unit and incorporated in image forming apparatus
HIRAYAMA YUSHI3 citations61
US8879963B2Nov 4, 2014
Toner supplying device and image forming apparatus using same
HIRAYAMA YUSHI2 citations60
FUJIMORI KOHTA
1 patentTOMITA KENTAROH
1 patentKANEKO SATOSHI
1 patentShowing the top 50 of 60 patents by PatentIndex Score.