Inventor
YOSHINAGA HIROSHI
JP249 patents
⚠️ This page may combine multiple inventors who share the name “YOSHINAGA HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
26 patentsUS7379698B2May 27, 2008
Image forming apparatus and fixing apparatus for fixing toner image by using belt
RICOH KK60 citations98
US7022944B2Apr 4, 2006
Image forming apparatus preventing excessive increase in temperature of fixing device
RICOH KK90 citations98
US6892044B2May 10, 2005
Liquid application apparatus and image formation apparatus
RICOH KK84 citations98
US6881927B2Apr 19, 2005
Image forming apparatus preventing excessive increase in temperature of fixing device
RICOH KK85 citations98
US6785505B2Aug 31, 2004
Fixing device preventing rubbing of toner image
RICOH KK83 citations98
US6778790B2Aug 17, 2004
Fixing device capable of preventing excessive increase in temperature
RICOH KK89 citations98
US6778804B2Aug 17, 2004
Fixing device and image forming apparatus including the same
RICOH KK71 citations98
US6628916B2Sep 30, 2003
Fixing device preventing rubbing of toner image
RICOH KK107 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
US5887224AMar 23, 1999
Image forming device with improved mixing of circulated developer with replensihed toner
RICOH KK97 citations98
US7509085B2Mar 24, 2009
Image forming apparatus, fixing apparatus and toner
RICOH KK95 citations96
US7151907B2Dec 19, 2006
Fixing device, image forming apparatus using the same and process cartridge
RICOH KK61 citations96
US6636709B2Oct 21, 2003
Fixing device having temperature detecting member and image forming apparatus using said fixing device
RICOH KK108 citations96
US6546219B2Apr 8, 2003
Method and apparatus for performing a charging process on an image carrying device
RICOH KK70 citations95
US6055388AApr 25, 2000
Image forming apparatus and method for obtaining appropriate toner density
RICOH KK83 citations95
US6006050ADec 21, 1999
Image forming method and apparatus for controlling amount of supplied toner or agitating time
RICOH KK75 citations95
US6336013B1Jan 1, 2002
Image forming apparatus and process cartridge having magnet to prevent toner scattering
RICOH KK47 citations93
US6208826B1Mar 27, 2001
Transfer device having notches, method and image forming apparatus using the same transfer device or method
RICOH KK27 citations93
US6101351AAug 8, 2000
Image forming apparatus having a shutter mechanism for protecting an image bearing member
RICOH KK46 citations93
US6055394AApr 25, 2000
Reliable cover switch employing machine
RICOH KK52 citations93
US5559593ASep 24, 1996
Cleaning device for an image forming apparatus
RICOH KK28 citations93
US6778797B2Aug 17, 2004
Charging roller having elastic member
RICOH KK26 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
US6256465B1Jul 3, 2001
Image forming apparatus and image forming unit therefor
RICOH KK40 citations92
US5915143AJun 22, 1999
Image forming apparatus and method for automatically adjusting toner density in response to humidity variations
RICOH KK55 citations92
RICOH CO LTD
3 patentsUS8023861B2Sep 20, 2011
Fixing device and image-forming apparatus comprising the same
RICOH CO LTD21 citations93
US7912392B2Mar 22, 2011
Image forming apparatus with glossy image printing mode
RICOH CO LTD31 citations92
US8364052B2Jan 29, 2013
Fixing device and image forming apparatus incorporating same
RICOH CO LTD10 citations84
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
3 patentsUS7227504B2Jun 5, 2007
Gate antenna device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD27 citations92
US7164344B2Jan 16, 2007
Non-contact IC card reading/writing apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD45 citations92
US7339120B2Mar 4, 2008
Electromagnetic wave shield
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD28 citations89
YAMAGUCHI YOSHIKI
3 patentsUS8725038B2May 13, 2014
Belt assembly, fixing device, and image forming apparatus incorporating same
YAMAGUCHI YOSHIKI10 citations84
US8498561B2Jul 30, 2013
Fixing device and image forming apparatus incorporating same having a reinforcing member including first and second flanges
YAMAGUCHI YOSHIKI7 citations84
US8447220B2May 21, 2013
Fixing device and image forming apparatus including same
YAMAGUCHI YOSHIKI8 citations84
SHINSHI AKIRA
2 patentsUS8064798B2Nov 22, 2011
Fixing device and image forming apparatus with heating member heated uniformly in circumferential direction
SHINSHI AKIRA24 citations92
US8219015B2Jul 10, 2012
Fixing device and image forming apparatus incorporating same which includes a plate spring to press a low-friction sheet
SHINSHI AKIRA15 citations84
RICOH LTD
1 patentSUMITOMO RUBBER IND
1 patentFUJITSU LTD
1 patentKUNII HIROYUKI
1 patentIBM
1 patentIKEBUCHI YUTAKA
1 patentSESHITA TAKUYA
1 patentARAI YUJI
1 patentHASE TAKAMASA
1 patentFUJIMOTO IPPEI
1 patentYAMASHINA RYOTA
1 patentSHIMOKAWA TOSHIHIKO
1 patentYOSHIKAWA MASAAKI
1 patentShowing the top 50 of 249 patents by PatentIndex Score.