Inventor
KAWAHARA MASATAKA
JP53 patents
⚠️ This page may combine multiple inventors who share the name “KAWAHARA MASATAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
48 patentsUS9869032B2Jan 16, 2018
Manufacturing method of phthalocyanine crystal by milling crystal transformation for at least 1,000 hours
CANON KK32 citations94
US9645516B2May 9, 2017
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK36 citations94
US9645515B2May 9, 2017
Electrophotographic photosensitive member and manufacturing method thereof, process cartridge and electrophotographic apparatus, and phthalocyanine crystal and manufacturing method thereof
CANON KK31 citations94
US9563139B2Feb 7, 2017
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK36 citations94
US9535347B2Jan 3, 2017
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK23 citations94
US9459542B2Oct 4, 2016
Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and gallium phthalocyanine crystal
CANON KK24 citations94
US9436106B2Sep 6, 2016
Electrophotographic photosensitive member and manufacturing method therefor, process cartridge and electrophotographic apparatus including the electrophotographic photosensitive member, and phthalocyanine crystal and method producing therefor
CANON KK33 citations94
US9068083B2Jun 30, 2015
Method of producing gallium phthalocyanine crystal and method of producing electrophotographic photosensitive member using the method of producing gallium phthalocyanine crystal
CANON KK28 citations94
US8974991B2Mar 10, 2015
Electrophotographic photosensitive member, method of producing phthalocyanine crystal, method of producing electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine crystal
CANON KK31 citations94
US8841052B2Sep 23, 2014
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK32 citations94
US9541850B2Jan 10, 2017
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK19 citations93
US9459545B2Oct 4, 2016
Electrophotographic photosensitive member, manufacturing method of electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and a solid solution and manufacturing method of a solid solution
CANON KK22 citations93
US7629102B2Dec 8, 2009
Method for preparing electrophotographic photosensitive member
CANON KK38 citations93
US6258498B1Jul 10, 2001
Electrophotographic photosensitive member, and process cartridge and electrophotographic photosensitive member
CANON KK32 citations93
US7749667B2Jul 6, 2010
Image forming method, and electrophotographic apparatus making use of the image forming method
CANON KK32 citations92
US7718331B2May 18, 2010
Electrophotographic photosensitive member with depressed portions, process cartridge holding the electrophotographic photosensitive member and electrophotographic apparatus with the electrophotographic photosensitive member
CANON KK41 citations92
US7622238B2Nov 24, 2009
Process for producing electrophotographic photosensitive member
CANON KK36 citations92
US7556901B2Jul 7, 2009
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK24 citations92
US7551878B2Jun 23, 2009
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK39 citations92
US7333752B2Feb 19, 2008
Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus which have the electrophotographic photosensitive member
CANON KK42 citations92
US5910386AJun 8, 1999
Electrophotographic photosensitive member, and electrophotographic apparatus and process cartridge employing the same
CANON KK23 citations92
US11249407B2Feb 15, 2022
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK12 citations86
US11237493B2Feb 1, 2022
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK12 citations86
US11181837B2Nov 23, 2021
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK12 citations86
US11126097B2Sep 21, 2021
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK12 citations86
US6623899B2Sep 23, 2003
Electrophotographic photosensitive member, process for production thereof, process cartridge and electrophotographic apparatus
CANON KK14 citations84
US6296978B1Oct 2, 2001
Electrophotographic photosensitive member, a process-cartridge inclusive thereof, and an image forming apparatus
CANON KK19 citations84
US6551752B2Apr 22, 2003
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK8 citations74
US9746790B2Aug 29, 2017
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same
CANON KK2 citations73
US9720337B2Aug 1, 2017
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same
CANON KK2 citations73
US9709907B2Jul 18, 2017
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK4 citations73
US7097950B2Aug 29, 2006
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK6 citations73
US9864284B2Jan 9, 2018
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK2 citations72
US9753385B2Sep 5, 2017
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK3 citations72
US9040218B2May 26, 2015
Solution of gallium phthalocyanine method for preparing the same method for producing gallium phthalocyanine crystal method for purifying composition containing gallium phthalocyanine and method for producing electrophotographic photosensitive member
CANON KK2 citations63
US7160659B2Jan 9, 2007
Electrophotographic apparatus and process cartridge
CANON KK2 citations63
US6558861B2May 6, 2003
Transfer sheet and image-forming method
CANON KK2 citations63
US10401746B2Sep 3, 2019
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK1 citations61
US10012915B2Jul 3, 2018
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same
CANON KK0 citations52
US9535345B2Jan 3, 2017
Solution of gallium phthalocyanine method for preparing the same method for producing gallium phthalocyanine crystal method for purifying composition containing gallium phthalocyanine and method for producing electrophotographic photosensitive member
CANON KK0 citations52
US9519232B2Dec 13, 2016
Electrophotographic photosensitive member, method for producing electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and hydroxygallium phthalocyanine crystal
CANON KK1 citations52
US9341965B2May 17, 2016
Electrophotographic photosensitive member, method for manufacturing the same, electrophotographic apparatus, process cartridge, and hydroxygallium phthalocyanine crystal
CANON KK0 citations52
US9298115B2Mar 29, 2016
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK0 citations52
US9104098B2Aug 11, 2015
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK0 citations52
US9086640B2Jul 21, 2015
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK0 citations52
US7452644B2Nov 18, 2008
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK1 citations52
US9921499B2Mar 20, 2018
Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine pigment
CANON KK1 citations51
US10429753B2Oct 1, 2019
Electrophotographic photoconductor, process cartridge, and electrophotographic apparatus
CANON KK0 citations42
TANAKA MASATO
1 patentNONAKA MASAKI
1 patentShowing the top 50 of 53 patents by PatentIndex Score.