Inventor · Mishima, JP

Masataka Kawahara

54Patents
20h-index
54Co-inventors
91Inventor score

Filing activity: Jul 9, 1997 → Jun 18, 2020

Most-cited inventions

PatentTitleAreaCited byStatus
US8088541B2 Polyvinyl acetal resin, electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Physics 53 Active
US7333752B2 Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus which have the electrophotographic photosensitive member Physics 38 Active
US7718331B2 Electrophotographic photosensitive member with depressed portions, process cartridge holding the electrophotographic photosensitive member and electrophotographic apparatus with the electrophotographic photosensitive member Physics 37 Active
US7622238B2 Process for producing electrophotographic photosensitive member Physics 36 Active
US7551878B2 Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Physics 35 Active
US7629102B2 Method for preparing electrophotographic photosensitive member Physics 34 Active
US9563139B2 Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Physics 33 Active
US9645516B2 Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Physics 33 Active
US7749667B2 Image forming method, and electrophotographic apparatus making use of the image forming method Physics 31 Active
US9869032B2 Manufacturing method of phthalocyanine crystal by milling crystal transformation for at least 1,000 hours Physics 30 Active
US9436106B2 Electrophotographic photosensitive member and manufacturing method therefor, process cartridge and electrophotographic apparatus including the electrophotographic photosensitive member, and phthalocyanine crystal and method producing therefor Physics 30 Active
US9645515B2 Electrophotographic photosensitive member and manufacturing method thereof, process cartridge and electrophotographic apparatus, and phthalocyanine crystal and manufacturing method thereof Physics 28 Active
US8974991B2 Electrophotographic photosensitive member, method of producing phthalocyanine crystal, method of producing electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine crystal Physics 28 Active
US9068083B2 Method of producing gallium phthalocyanine crystal and method of producing electrophotographic photosensitive member using the method of producing gallium phthalocyanine crystal Physics 26 Active
US8841052B2 Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Physics 26 Active
US9459542B2 Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and gallium phthalocyanine crystal Physics 22 Active
US7556901B2 Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Physics 21 Active
US9459545B2 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 Physics 21 Active
US6258498A Electrophotographic photosensitive member, and process cartridge and electrophotographic photosensitive member Physics 21 Expired
US9535347B2 Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Physics 20 Active
US5910386A Electrophotographic photosensitive member, and electrophotographic apparatus and process cartridge employing the same Physics 20 Expired
US9541850B2 Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Physics 18 Active
US6296978A Electrophotographic photosensitive member, a process-cartridge inclusive thereof, and an image forming apparatus Physics 14 Expired
US6623899B2 Electrophotographic photosensitive member, process for production thereof, process cartridge and electrophotographic apparatus Physics 11 Expired
US11249407B2 Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus Physics 9 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.