Inventor
ZEMBA HIDEKI
JP34 patents
⚠️ This page may combine multiple inventors who share the name “ZEMBA HIDEKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
24 patentsUS6266501B1Jul 24, 2001
Image-forming apparatus having a seal for a developer and a method for detecting a removal of the seal
RICOH KK90 citations98
US6975830B2Dec 13, 2005
Image forming apparatus, process cartridge, and waste toner recovery device
RICOH KK37 citations96
US6148161ANov 14, 2000
Image forming apparatus with improved toner density control
RICOH KK64 citations96
US6144822ANov 7, 2000
Image forming apparatus having detachable transfer roller and discharge device
RICOH KK63 citations96
US7184684B2Feb 27, 2007
Image forming apparatus, process cartridge, and waste toner recovery device
RICOH KK16 citations93
US7672605B2Mar 2, 2010
Transfer device and image forming apparatus
RICOH KK22 citations92
US7630659B2Dec 8, 2009
Method and apparatus for image forming capable of effectively performing a charging process
RICOH KK23 citations92
US7292817B2Nov 6, 2007
Image forming apparatus, process cartridge, and waste toner recovery device
RICOH KK15 citations92
US7136610B2Nov 14, 2006
Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itself
RICOH KK38 citations92
US7024133B2Apr 4, 2006
Image forming apparatus using a user installable process cartridge, a method of arranging the process cartridge, and the process cartridge itself
RICOH KK50 citations92
US7010246B2Mar 7, 2006
Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drum
RICOH KK13 citations92
US7734233B2Jun 8, 2010
Development device, process cartridge, and image forming apparatus
RICOH KK8 citations84
US7305203B2Dec 4, 2007
Image forming apparatus including a process cartridge formed with a hole
RICOH KK13 citations84
US7295796B1Nov 13, 2007
Image forming apparatus having a temporary toner holding device and a toner collecting device
RICOH KK14 citations84
US6993281B2Jan 31, 2006
Image forming apparatus and process cartridge including flexible member
RICOH KK12 citations84
US7321742B2Jan 22, 2008
Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drum
RICOH KK8 citations74
US7110699B2Sep 19, 2006
Image forming apparatus and process cartridge for use in the same
RICOH KK8 citations74
US7106991B2Sep 12, 2006
Process cartridge smoothly and stably attached to and detached from an image forming apparatus, and an image forming apparatus including the process cartridge
RICOH KK9 citations73
US7672625B2Mar 2, 2010
Developing device using electrostatic transport and hopping (ETH)
RICOH KK4 citations63
US7548712B2Jun 16, 2009
Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drum
RICOH KK2 citations63
US7466947B2Dec 16, 2008
Apparatus for foming images
RICOH KK6 citations63
US7555243B2Jun 30, 2009
Charging member, process cartridge including the same, and image forming apparatus including the same
RICOH KK0 citations52
US7366449B2Apr 29, 2008
Developing unit, process cartridge, and image forming apparatus
RICOH KK1 citations52
US7603062B2Oct 13, 2009
Conductive member, and charging roller, process cartridge and image forming apparatus using same
RICOH KK0 citations41
YOSHIDA RYUJI
4 patentsUS9091969B2Jul 28, 2015
Electrophotographic image forming apparatus
YOSHIDA RYUJI4 citations71
US8818255B2Aug 26, 2014
Image forming apparatus with fixing liquid applicator
YOSHIDA RYUJI0 citations50
US8774694B2Jul 8, 2014
Image forming apparatus including sealed fixing liquid applying section
YOSHIDA RYUJI0 citations40
US8761651B2Jun 24, 2014
Image forming apparatus
YOSHIDA RYUJI0 citations40