Inventor
MARUYAMA AKIO
JP43 patents
⚠️ This page may combine multiple inventors who share the name “MARUYAMA AKIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
41 patentsUS6416915B1Jul 9, 2002
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK91 citations98
US6180303B1Jan 30, 2001
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and process for producing the same photosensitive member
CANON KK89 citations98
US7226711B2Jun 5, 2007
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK50 citations96
US6372397B1Apr 16, 2002
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK53 citations96
US5455135AOct 3, 1995
Electrophotographic photosensitive member with overlayer and electrophotographic apparatus employing same
CANON KK58 citations96
US6664014B1Dec 16, 2003
Electrophotographic photosensitive member electrophotographic apparatus using same and device unit using same
CANON KK43 citations93
US6436597B2Aug 20, 2002
Electrophotographic photosensitve member, process for producing electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus which have the electrophotographic photosensitive member
CANON KK33 citations93
US6289190B1Sep 11, 2001
Electrophotographic apparatus and process cartridge
CANON KK27 citations93
US6110628AAug 29, 2000
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
CANON KK29 citations93
US5176976AJan 5, 1993
Organic electronic material and electrophotographic photosensitive member containing same
CANON KK21 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
US7534534B2May 19, 2009
Electrophotographic Photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK36 citations92
US7186489B2Mar 6, 2007
Electrophotographic photosensitive member, electrophotographic photosensitive member manufacturing process, process cartridge, and electrophotographic apparatus
CANON KK48 citations92
US6016414AJan 18, 2000
Electrophotographic photosensitive member, electrophotographic apparatus and process cartridge
CANON KK23 citations92
US5708932AJan 13, 1998
Charging system and electrophotography apparatus
CANON KK21 citations92
US5693443ADec 2, 1997
Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus having the same
CANON KK41 citations92
US5677095AOct 14, 1997
Electrophotographic photosensitive member
CANON KK34 citations92
US5430527AJul 4, 1995
Electrophotographic apparatus having cleaning width larger than charging width
CANON KK21 citations92
US5422210AJun 6, 1995
Electrophotographic photosensitive member and electrophotographic apparatus, device unit and facsimile machine using the same
CANON KK47 citations92
US5391449AFeb 21, 1995
Electrophotographic photosensitive member
CANON KK41 citations92
US5385797AJan 31, 1995
Electrophotographic photosensitive member, and electrophotographic apparatus, device unit, and facsimile machine employing the same
CANON KK27 citations92
US4898798AFeb 6, 1990
Photosensitive member having a light receiving layer comprising a carbonic film for use in electrophotography
CANON KK36 citations92
US5667926ASep 16, 1997
Electrophotographic apparatus and image forming process
CANON KK37 citations91
US5701571ADec 23, 1997
Electrophotographic apparatus, process cartridge, and image forming method featuring a photosensitive member having a conductive surface layer and a cleaning means having conductive properties
CANON KK18 citations88
US7563553B2Jul 21, 2009
Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
CANON KK16 citations84
US5327272AJul 5, 1994
Optical modulation element
CANON KK19 citations82
US5352552AOct 4, 1994
Image-bearing member and apparatus including same
CANON KK19 citations81
US5923925AJul 13, 1999
Electrophotographic apparatus
CANON KK16 citations74
US5890037AMar 30, 1999
Electrophotographic apparatus using photoconductive member chargeable with magnetic brush
CANON KK14 citations74
US5729801AMar 17, 1998
Electrophotographic apparatus and process cartridge
CANON KK8 citations74
US4974026ANov 27, 1990
Reverse development electrophotographic apparatus and image forming method using a dispersion-type organic photoconductor
CANON KK12 citations74
US4892800AJan 9, 1990
Photosensitive member having a photoconductive layer comprising a carbonic film for use in electrophotography
CANON KK9 citations74
US4882257ANov 21, 1989
Electrophotographic device
CANON KK11 citations74
US5484673AJan 16, 1996
Electrophotographic photosensitive member
CANON KK7 citations73
US5391446AFeb 21, 1995
Image holding member
CANON KK18 citations73
US5838410ANov 17, 1998
Optical modulation element
CANON KK0 citations52
US12493250B2Dec 9, 2025
External additive particles, toner, and method for producing external additive particles
CANON KK0 citations51