Inventor
HAGI MASAYUKI
JP49 patents
⚠️ This page may combine multiple inventors who share the name “HAGI MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MINOLTA CO LTD
22 patentsUS6541173B1Apr 1, 2003
Color toner for developing electrostatic image comprising two kinds of polyesters and two kinds of releasing agents
MINOLTA CO LTD22 citations92
US6338929B1Jan 15, 2002
Toner for developing an electrostatic latent image
MINOLTA CO LTD41 citations92
US5976750ANov 2, 1999
Electrostatic latent image-developing toner containing specified toner particles and specified external additives
MINOLTA CO LTD24 citations92
US5776646AJul 7, 1998
Negatively chargeable toner with specified fine particles added externally
MINOLTA CO LTD38 citations92
US5759731AJun 2, 1998
Toner for electrophotography with specified fine particles added externally
MINOLTA CO LTD24 citations92
US5747211AMay 5, 1998
Toner for developing electrostatic latent images
MINOLTA CO LTD25 citations92
US5707769AJan 13, 1998
Yellow toner and magenta toner and image forming apparatus and method using same
MINOLTA CO LTD27 citations89
US6777151B2Aug 17, 2004
Negatively chargeable toner and image-forming method
MINOLTA CO LTD14 citations84
US6344302B1Feb 5, 2002
Developer for developing electrostatic latent images
MINOLTA CO LTD16 citations84
US6335135B1Jan 1, 2002
Toner for developing electrostatic latent image
MINOLTA CO LTD18 citations84
US6506530B1Jan 14, 2003
Color toner for developing electrostatic image, comprising first linear polyester and second non-linear polyester as binder resin
MINOLTA CO LTD12 citations74
US6503679B2Jan 7, 2003
Color toner for developing an electrostatic image
MINOLTA CO LTD9 citations74
US6352808B1Mar 5, 2002
Electrostatic-latent-image developing toner and inorganic particles used for such a toner
MINOLTA CO LTD9 citations74
US5879848AMar 9, 1999
Toner for full color developing
MINOLTA CO LTD10 citations74
US5840458ANov 24, 1998
Developer for developing an electrostatic latent image to which laminated titanium oxide is externally added
MINOLTA CO LTD13 citations74
US5794105AAug 11, 1998
Image forming apparatus and toner for full color development
MINOLTA CO LTD8 citations74
US5759728AJun 2, 1998
Black toner for developing electrostatic latent images with carbon black dispersed in specific distribution
MINOLTA CO LTD12 citations74
US6132920AOct 17, 2000
Toner for developing electrostatic latent image
MINOLTA CO LTD6 citations73
US6709798B2Mar 23, 2004
Full color image forming method
MINOLTA CO LTD6 citations63
US6482561B1Nov 19, 2002
Toner used for developing electrostatic latent image
MINOLTA CO LTD3 citations63
US6335134B1Jan 1, 2002
Toner for an electrostatic latent image development
MINOLTA CO LTD4 citations63
US6194116B1Feb 27, 2001
Toner containing specific alkyl carboxylic acid with fine particles externally added
MINOLTA CO LTD5 citations62
RICOH CO LTD
11 patentsUS7838193B2Nov 23, 2010
Toner and image forming method using the toner
RICOH CO LTD10 citations84
US7833686B2Nov 16, 2010
Toner and method for producing the same, toner kit, and developer, process cartridge, image forming method and image forming apparatus
RICOH CO LTD6 citations74
US8021814B2Sep 20, 2011
Toner, and oilless fixing method and process cartridge using the toner
RICOH CO LTD4 citations63
US7970323B2Jun 28, 2011
Developing device, developer therefor, and image forming method and apparatus, and process cartridge using the developing device
RICOH CO LTD2 citations63
US7873300B2Jan 18, 2011
Single component development device, process cartridge and toner
RICOH CO LTD4 citations63
US7867680B2Jan 11, 2011
Non-magnetic toner for one-component development and method of preparing the toner, and image developer, image forming apparatus, process cartridge and image forming method
RICOH CO LTD2 citations63
US8053154B2Nov 8, 2011
Toner and image forming method
RICOH CO LTD1 citations52
US8043779B2Oct 25, 2011
Pulverized toner
RICOH CO LTD1 citations52
US8041270B2Oct 18, 2011
Image developer using one-component developer
RICOH CO LTD1 citations52
US8007973B2Aug 30, 2011
Full-color toner kit, process cartridge, and image forming method
RICOH CO LTD0 citations52
US7981593B2Jul 19, 2011
Toner, developer including the toner, and image forming method and apparatus using the toner
RICOH CO LTD1 citations52
RICOH KK
10 patentsUS7556904B2Jul 7, 2009
Toner for electrostatic development, developer, image forming method, image-forming apparatus and process for cartridge using the same
RICOH KK23 citations93
US7720428B2May 18, 2010
Toner recovery apparatus, process cartridge, and image forming apparatus
RICOH KK19 citations92
US7749671B2Jul 6, 2010
Toner for developing a latent electrostatic image, image-forming method, image-forming apparatus and process cartridge using the same
RICOH KK15 citations84
US7727694B2Jun 1, 2010
Toner for developing electrostatic image, and image forming method and apparatus and process cartridge using the toner
RICOH KK9 citations84
US7695885B2Apr 13, 2010
Developer and image forming method using the developer
RICOH KK18 citations84
US7632619B2Dec 15, 2009
Toner, fixing method and image forming method using the toner
RICOH KK10 citations84
US7587159B2Sep 8, 2009
Image forming method and apparatus including a relationship between secondary roller diameter and recording medium ingress position
RICOH KK11 citations84
US7556906B2Jul 7, 2009
Toner, and image forming method, image forming apparatus, and process cartridge using the toner
RICOH KK13 citations84
US7820348B2Oct 26, 2010
Toner recovery apparatus, process cartridge, and image forming apparatus
RICOH KK6 citations74
US7817946B2Oct 19, 2010
Developing device, image developing method, image forming apparatus, image forming method, and process cartridge
RICOH KK7 citations74