Inventor
IWAMOTO YASUAKI
JP57 patents
⚠️ This page may combine multiple inventors who share the name “IWAMOTO YASUAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
43 patentsUS6468706B2Oct 22, 2002
Two-component developer, container filled with the two-component developer, and image formation apparatus
RICOH KK130 citations99
US6363229B1Mar 26, 2002
Full-color toner image fixing method and apparatus
RICOH KK174 citations99
US7374851B2May 20, 2008
Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming method
RICOH KK67 citations98
US7318989B2Jan 15, 2008
Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method
RICOH KK71 citations98
US6699632B2Mar 2, 2004
Image forming toner, and image forming method and image forming apparatus using the toner
RICOH KK72 citations98
US6667141B2Dec 23, 2003
Image forming method and apparatus
RICOH KK98 citations98
US5840456ANov 24, 1998
Color toner comprising two binder resins of differing softening point
RICOH KK125 citations98
US6946229B2Sep 20, 2005
Toner for forming color image, image forming apparatus, and toner container
RICOH KK54 citations96
US6593048B2Jul 15, 2003
Two-component developer, and image forming apparatus and image forming method using the developer
RICOH KK97 citations96
US6544704B1Apr 8, 2003
Two-component developer, container filled with the two-component developer, and image formation apparatus
RICOH KK59 citations96
US6303257B1Oct 16, 2001
Electrophotographic toner and image forming method using the toner
RICOH KK66 citations96
US6258502B1Jul 10, 2001
Two-component developer, two-component developer holding container, and electrophotographic image formation apparatus equipped with the container
RICOH KK73 citations96
US5225303AJul 6, 1993
Dry-type toner including waxes release agent for electrophotography
RICOH KK63 citations96
US6183926B1Feb 6, 2001
Toner and two-component developer for electrophotographic process and image formation method and image formation apparatus using the toner
RICOH KK73 citations95
US4980258ADec 25, 1990
Dry type developer for electrophotography
RICOH KK78 citations95
US7521164B2Apr 21, 2009
Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming method
RICOH KK22 citations93
US7368212B2May 6, 2008
Toner for developing electrostatic image, developer, image forming apparatus, process for forming image, process cartridge and process for measuring porosity of toner
RICOH KK23 citations93
US7288353B2Oct 30, 2007
Toner, developer, image developer and image forming apparatus
RICOH KK18 citations93
US7261989B2Aug 28, 2007
Toner for developing electrostatic images, developer, image forming method, and image forming apparatus
RICOH KK49 citations93
US7258959B2Aug 21, 2007
Toner for electrophotography and image forming apparatus
RICOH KK42 citations93
US7172844B2Feb 6, 2007
Toner for electrophotography, and image forming process, process cartridge and image forming apparatus using the same
RICOH KK36 citations93
US7169525B2Jan 30, 2007
Toner, developer, image forming apparatus, process cartridge and image forming process
RICOH KK37 citations93
US7163773B2Jan 16, 2007
Toner for developing electrostatic image, developer, process for forming image, and image forming apparatus
RICOH KK27 citations93
US6911289B2Jun 28, 2005
Toner, method for manufacturing the toner, and image forming method and apparatus using the toner
RICOH KK26 citations93
US6856781B2Feb 15, 2005
Image forming apparatus and method of developing an electrostatic latent image
RICOH KK25 citations93
US6811944B2Nov 2, 2004
Toner, method for manufacturing the toner, and image forming method and apparatus using the toner
RICOH KK36 citations93
US6813461B2Nov 2, 2004
Toner, method for manufacturing the toner, and image forming method and apparatus using the toner
RICOH KK26 citations93
US5514511AMay 7, 1996
Toner for developing latent electrostatic images
RICOH KK30 citations93
US5314777AMay 24, 1994
Negatively chargeable toner for developing latent electrostatic images
RICOH KK25 citations93
US7166403B2Jan 23, 2007
Toner, developer, image developing apparatus, and image forming apparatus
RICOH KK29 citations92
US7029816B2Apr 18, 2006
Electrographic image formation method
RICOH KK20 citations92
US6835517B2Dec 28, 2004
Toner, developer and image forming method using the toner
RICOH KK36 citations92
US6790575B2Sep 14, 2004
Two-component developer, image forming apparatus, and image forming method
RICOH KK43 citations92
US4841331AJun 20, 1989
Triboelectric charge application member for toner
RICOH KK36 citations92
US6503681B2Jan 7, 2003
Process for the production of toner for developing electrostatic image
RICOH KK34 citations90
US6368765B2Apr 9, 2002
Method of producing toner for developing latent electrostatic images
RICOH KK40 citations90
US7718340B2May 18, 2010
Image forming apparatus, image forming method, and process cartridge
RICOH KK12 citations84
US7713672B2May 11, 2010
Image forming apparatus, image forming method and process cartridge
RICOH KK15 citations84
US7566521B2Jul 28, 2009
Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method
RICOH KK11 citations84
US7442484B2Oct 28, 2008
Image forming method using toner
RICOH KK16 citations83
US4945022AJul 31, 1990
Triboelectric charge application member for toner comprising copolymer of fluoro-olefin monomer and unsaturated silicon monomer
RICOH KK21 citations82
US7413838B2Aug 19, 2008
External additives for electrophotographic toner, electrophotographic toner, electrophotographic developer, image forming method and image forming apparatus
RICOH KK8 citations74
US7749674B2Jul 6, 2010
Toner, developer, image developer and image forming apparatus
RICOH KK4 citations63
RICOH CO LTD
4 patentsUS8034526B2Oct 11, 2011
Method for manufacturing toner and toner
RICOH CO LTD18 citations84
US8007974B2Aug 30, 2011
Toner, image forming apparatus using the same, image forming method using the same, and process cartridge
RICOH CO LTD5 citations63
US7873304B2Jan 18, 2011
Image forming apparatus, image forming method, and process cartridge
RICOH CO LTD6 citations63
US7862973B2Jan 4, 2011
Toner and developer, and image forming apparatus, image forming method and process cartridge
RICOH CO LTD4 citations63
SANYO CHEMICAL IND LTD
1 patentIWAMOTO YASUAKI
1 patentWATANABE NAOHIRO
1 patentShowing the top 50 of 57 patents by PatentIndex Score.