Inventor
KOISHI ISAO
JP54 patents
⚠️ This page may combine multiple inventors who share the name “KOISHI ISAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
47 patentsUS7315710B2Jan 1, 2008
Electrophotographic photosensitive drum supporting apparatus, process cartridge and electrophotographic image forming apparatus
CANON KK140 citations99
US7184690B2Feb 27, 2007
Electrophotographic photosensitive drum supporting apparatus, process cartridge and electrophotographic image forming apparatus
CANON KK182 citations99
US7003247B2Feb 21, 2006
Electrophotographic photosensitive drum, process cartridge, and electrophotographic image forming apparatus
CANON KK154 citations99
US7890012B2Feb 15, 2011
Process cartridge having a drum, a developing roller, and first and second frames, and electrophotographic image forming apparatus on which such process cartridge is mountable
CANON KK60 citations98
US7813671B2Oct 12, 2010
Process cartridge and electrophotographic image forming apparatus
CANON KK63 citations98
US7457566B2Nov 25, 2008
Electrophotosensitive drum having non-circular twisted projection with electroconductive member thereon, process cartridge having such drum, and electrophotographic image forming apparatus to which the cartridge is detachably mountable
CANON KK68 citations98
US7158749B2Jan 2, 2007
Cleaning device, process cartridge, cleaning member and electrophotographic image forming apparatus
CANON KK72 citations98
US7139502B2Nov 21, 2006
Process cartridge and electrophotographic image forming apparatus
CANON KK151 citations98
US11199807B2Dec 14, 2021
Cartridge and drum unit for electrophotographic image forming apparatus
CANON KK12 citations94
USD587304SFeb 24, 2009
Toner cartridge
CANON KK27 citations93
US10671015B2Jun 2, 2020
Cartridge and drum unit for electrophotographic image forming apparatus
CANON KK10 citations92
US10203652B2Feb 12, 2019
Cartridge and drum unit for electrophotographic image forming apparatus
CANON KK11 citations92
US9823619B2Nov 21, 2017
Cartridge detachably mountable to main assembly of electrophotographic image forming apparatus, assembling method for drive transmitting device for photosensitive drum, and electrophotographic image forming apparatus
CANON KK12 citations92
US9791825B2Oct 17, 2017
Cartridge and drum unit for electrophotographic image forming apparatus
CANON KK14 citations92
US9395679B2Jul 19, 2016
Cartridge detachably mountable to main assembly of electrophotographic image forming apparatus, assembling method for drive transmitting device for photosensitive drum, and electrophotographic image forming apparatus
CANON KK16 citations92
US8862015B2Oct 14, 2014
Image forming apparatus with urging member that establishes electrical connection with a cartridge
CANON KK18 citations92
US7856192B2Dec 21, 2010
Process cartridge and electrophotographic image forming apparatus
CANON KK44 citations92
US7072601B2Jul 4, 2006
Process cartridge, method of assembling process cartridge, and connecting member
CANON KK42 citations92
US11163259B2Nov 2, 2021
Cartridge detachably mountable to main assembly of electrophotographic image forming apparatus, assembling method for drive transmitting device for photosensitive drum, and electrophotographic image forming apparatus
CANON KK5 citations84
US11048207B2Jun 29, 2021
Image forming apparatus having a movable member and cartridge having a pressing portion for pressing the movable member
CANON KK6 citations84
US10635045B2Apr 28, 2020
Cartridge detachably mountable to main assembly of electrophotographic image forming apparatus, assembling method for drive transmitting device for photosensitive drum, and electrophotographic image forming apparatus
CANON KK5 citations84
USD823938SJul 24, 2018
Cartridge
CANON KK12 citations84
USD823380SJul 17, 2018
Cartridge
CANON KK14 citations84
USD796574SSep 5, 2017
Photosensitive drum for cartridge
CANON KK16 citations84
USD786968SMay 16, 2017
Process cartridge for printer
CANON KK15 citations84
US9501031B2Nov 22, 2016
Packaged cartridge, packing material and cartridge
CANON KK11 citations84
US10427867B2Oct 1, 2019
Packing member and cartridge packed in the packing member
CANON KK11 citations83
US9708116B2Jul 18, 2017
Packing member and cartridge packed in the packing member
CANON KK12 citations83
US9423767B2Aug 23, 2016
Packing member and cartridge packed in the packing member
CANON KK12 citations83
US10353339B2Jul 16, 2019
Cartridge with restriction member for restricting relative movement of toner cartridge and process cartridge
CANON KK12 citations82
US12130579B2Oct 29, 2024
Cartridge and drum unit for electrophotographic image forming apparatus
CANON KK1 citations73
US12066786B2Aug 20, 2024
Cartridge and drum unit for electrophotographic image forming apparatus
CANON KK2 citations73
US12066769B2Aug 20, 2024
Toner container having a shutter and an engaging portion exposed from the shutter
CANON KK2 citations73
US11829096B2Nov 28, 2023
Cartridge, attachment and mounting kit
CANON KK2 citations73
US11669044B2Jun 6, 2023
Cartridge having a portion-to-be-positioned and a pressing portion configured in relation to a corresponding apparatus
CANON KK2 citations73
US11619905B2Apr 4, 2023
Cartridge detachably mountable to main assembly of electrophotographic image forming apparatus, assembling method for drive transmitting device for photosensitive drum, and electrophotographic image forming apparatus
CANON KK2 citations73
US11579561B2Feb 14, 2023
Cartridge and drum unit for electrophotographic image forming apparatus
CANON KK2 citations73
US11256209B2Feb 22, 2022
Image forming system having a movable member and first and second cartridges having a pressing portion for pressing the movable member
CANON KK4 citations73
US9310756B2Apr 12, 2016
Image forming apparatus and main assembly of the image forming apparatus
CANON KK4 citations73
US12271136B2Apr 8, 2025
Image forming apparatus including a display unit for displaying information about a procedure for replenishing developer
CANON KK1 citations64
US12045005B2Jul 23, 2024
Cartridge assembly
CANON KK1 citations63
US11796947B2Oct 24, 2023
Image forming apparatus including a display unit for displaying information about a procedure for replenishing developer
CANON KK1 citations62
US11754946B2Sep 12, 2023
Image forming apparatus
CANON KK0 citations62
US11474452B2Oct 18, 2022
Image forming apparatus including an attachment portion to which to attach a supply container for supplying a developer
CANON KK0 citations62
US11454912B2Sep 27, 2022
Image forming apparatus including a display unit for displaying information about a procedure for replenishing developer
CANON KK1 citations62
USD1015421SFeb 20, 2024
Process cartridge for image forming apparatus
CANON KK0 citations60
US10962925B2Mar 30, 2021
Erroneous mounting prevention system
CANON KK0 citations52
KOISHI ISAO
3 patentsUS8139979B2Mar 20, 2012
Process cartridge and electrophotographic image forming apparatus
KOISHI ISAO44 citations93
US8526841B2Sep 3, 2013
Process cartridge and electrophotographic image forming apparatus
KOISHI ISAO32 citations92
US8781355B2Jul 15, 2014
Electrical contact, electrophotographic photosensitive drum, and process cartridge
KOISHI ISAO6 citations72
Showing the top 50 of 54 patents by PatentIndex Score.