Inventor
FUJITA RYOICHI
JP32 patents
⚠️ This page may combine multiple inventors who share the name “FUJITA RYOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
29 patentsUS6077635AJun 20, 2000
Toner, two-component developer and image forming method
CANON KK115 citations98
US5912099AJun 15, 1999
Magenta toner, process for producing same and color image forming method using same
CANON KK38 citations93
US5851714ADec 22, 1998
Toner for developing electrostatic image and fixing method
CANON KK38 citations93
US5700617ADec 23, 1997
Toner for developing electrostatic images and charge-controlling agent
CANON KK30 citations93
US5604071AFeb 18, 1997
Toner for developing electrostatic image
CANON KK27 citations93
US7244539B2Jul 17, 2007
Magnetic carrier and two-component developer
CANON KK36 citations92
US7144668B2Dec 5, 2006
Toner and two-component developer
CANON KK37 citations92
US6346356B1Feb 12, 2002
Toner, toner production process, and image-forming method
CANON KK35 citations92
US6312862B1Nov 6, 2001
Two-component type developer and image forming method
CANON KK25 citations92
US6137977AOct 24, 2000
Image forming method and image forming apparatus using specific developer composition
CANON KK33 citations92
US6013406AJan 11, 2000
Toner for developing electrostatic images, and image-forming method
CANON KK28 citations92
US5994019ANov 30, 1999
Image forming method
CANON KK22 citations92
US5747209AMay 5, 1998
Toner for developing electrostatic images containing aromatic hydroxycarboxylic acid and metal compound of the aromatic hydroxycarboxylic acid
CANON KK31 citations92
US5733702AMar 31, 1998
Image forming method employing toner with external additive
CANON KK21 citations92
US5670288ASep 23, 1997
Carrier for electrophotography, two-component type developer, and image forming method
CANON KK25 citations92
US5512402AApr 30, 1996
Carrier for electrophotography, two-component type developer, and image forming method
CANON KK36 citations92
US6187495B1Feb 13, 2001
Yellow toner, process for producing the tower and image forming method using the toner
CANON KK18 citations84
US7943281B2May 17, 2011
Black toner
CANON KK11 citations83
US7794909B2Sep 14, 2010
Toner
CANON KK14 citations83
US7794908B2Sep 14, 2010
Toner
CANON KK16 citations83
US7776501B2Aug 17, 2010
Color toner
CANON KK14 citations83
US5637432AJun 10, 1997
Toner for developing electrostatic image comprising titanium oxide particles
CANON KK16 citations82
US5885742AMar 23, 1999
Carrier for electrophotography, two-component type developer, and image forming method
CANON KK14 citations74
US5842097ANov 24, 1998
Image forming and transferring method using a peeling layer
CANON KK8 citations74
US5620824AApr 15, 1997
Toner, developer and image forming method
CANON KK14 citations74
US5418102AMay 23, 1995
Developer for developing electrostatic image, image forming method, toner imager fixing method and image forming apparatus
CANON KK9 citations74
US6285848B1Sep 4, 2001
Electrophotographic apparatus, image forming method, and process cartridge for developing an image with toner containing an external additive
CANON KK12 citations73
US6953648B2Oct 11, 2005
Process for producing toner particles
CANON KK8 citations69
US5750298AMay 12, 1998
Yellow toner for developing electrostatic image, two component developer, image sheet
CANON KK2 citations63