Inventor
SUGIYAMA RYO
JP29 patents
⚠️ This page may combine multiple inventors who share the name “SUGIYAMA RYO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
28 patentsUS8655238B2Feb 18, 2014
Developing member
CANON KK23 citations92
US10310447B2Jun 4, 2019
Electrophotographic member, process cartridge, and electrophotographic image forming apparatus
CANON KK14 citations85
US9952532B2Apr 24, 2018
Developing apparatus, electrophotographic process cartridge, and electrophotographic image forming apparatus
CANON KK20 citations85
US10976683B2Apr 13, 2021
Electrophotographic member, electrophotographic process cartridge, and electrophotographic image forming apparatus
CANON KK7 citations84
US10678161B2Jun 9, 2020
Electrophotographic member having elastic layer with elastic modulus of 0.5 to 3.0 MPA and coating layer with elastic modulus of 5.0 to 100 MPA
CANON KK10 citations84
US10571825B1Feb 25, 2020
Electrophotographic member, electrophotographic process cartridge and electrophotographic image forming apparatus
CANON KK7 citations84
US9921518B2Mar 20, 2018
Developing roller, with conductive elastic layer having exposed protrusions, cartridge and apparatus
CANON KK18 citations83
US10942471B2Mar 9, 2021
Electrophotographic member having a surface layer with a cross-linked urethane resin-containing matrix, process cartridge, and apparatus
CANON KK8 citations82
US11465383B2Oct 11, 2022
Electrophotographic member, electrophotographic process cartridge and electrophotographic image forming apparatus
CANON KK2 citations73
US10935903B2Mar 2, 2021
Developing roller, process cartridge and image forming apparatus
CANON KK3 citations73
US10712684B2Jul 14, 2020
Developing roller, electrophotographic process cartridge and electrophotographic image forming apparatus
CANON KK5 citations73
US10705449B2Jul 7, 2020
Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus
CANON KK4 citations73
US10642186B2May 5, 2020
Developing member having outer surface with independent electrically insulating domains, electrophotographic process cartridge, and electrophotographic image forming apparatus
CANON KK3 citations73
US10635019B2Apr 28, 2020
Developing roller, electrophotographic process cartridge and electrophotographic image forming apparatus
CANON KK6 citations73
US11650516B2May 16, 2023
Developing apparatus, electrophotography process cartridge, and electrophotographic image forming apparatus
CANON KK2 citations72
US10831127B2Nov 10, 2020
Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus
CANON KK4 citations72
US10078291B2Sep 18, 2018
Developing apparatus having a projecting regulating member and process cartridge
CANON KK4 citations72
US10895824B2Jan 19, 2021
Developing roller, process cartridge and electrophotographic image forming apparatus
CANON KK2 citations71
US10831126B2Nov 10, 2020
Developing roller having crown-shaped electro-conductive layer with outer surface providing electrically insulating first regions adjacent to second regions having higher conductivity
CANON KK4 citations71
US10895823B2Jan 19, 2021
Developing roller, process cartridge and electrophotographic image forming apparatus
CANON KK0 citations61
US12306572B2May 20, 2025
Process cartridge
CANON KK0 citations52
US12147172B2Nov 19, 2024
Developing device, cleaning method, process cartridge and electrophotographic image forming apparatus
CANON KK0 citations52
US10747140B2Aug 18, 2020
Developing apparatus, developer carrying member, process cartridge, and image forming apparatus
CANON KK0 citations52
US10073374B2Sep 11, 2018
Developing apparatus having multi-part regulating member, process cartridge and electrophotographic image forming apparatus
CANON KK1 citations51
US9989883B2Jun 5, 2018
Developing apparatus, process cartridge and electrophotographic image forming apparatus
CANON KK1 citations51
US12547088B2Feb 10, 2026
Electrophotographic member and method of producing the member, process cartridge, and electrophotographic image forming apparatus
CANON KK0 citations50
US12547096B2Feb 10, 2026
Developing apparatus, process cartridge, and image-forming apparatus
CANON KK0 citations50
US9971276B2May 15, 2018
Developing member, method of producing developing member, process cartridge, and electrophotographic apparatus
CANON KK0 citations40