Inventor
OKA TAKUYA
JP32 patents
⚠️ This page may combine multiple inventors who share the name “OKA TAKUYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
16 patentsUS11372348B2Jun 28, 2022
Developing device, cartridge, image forming apparatus
CANON KK4 citations71
US11860565B2Jan 2, 2024
Restricting member, developing device, process cartridge, and image forming apparatus
CANON KK2 citations70
US10877395B2Dec 29, 2020
Developing device, process cartridge and image forming apparatus
CANON KK1 citations62
US11835888B2Dec 5, 2023
Developing device, cartridge, image forming apparatus
CANON KK0 citations61
US12455528B2Oct 28, 2025
Restricting member, developing device, process cartridge, and image forming apparatus
CANON KK0 citations60
US11693335B2Jul 4, 2023
Development cartridge
CANON KK0 citations59
US11300900B2Apr 12, 2022
Development cartridge
CANON KK0 citations59
US12547111B2Feb 10, 2026
Image forming apparatus for mounting cartridges of different lifespans
CANON KK0 citations52
US12510858B2Dec 30, 2025
Image forming apparatus
CANON KK0 citations51
US12321108B2Jun 3, 2025
Image forming apparatus
CANON KK0 citations51
US11099503B2Aug 24, 2021
Image forming apparatus
CANON KK0 citations51
US11073788B2Jul 27, 2021
Process cartridge providing fixation layer to developer on image bearing member and image forming apparatus
CANON KK0 citations51
US10976685B2Apr 13, 2021
Image forming apparatus to perform an activation control using a developing bias applying member and a speed control unit
CANON KK0 citations51
US10852662B2Dec 1, 2020
Developing device, process cartridge and image forming apparatus
CANON KK0 citations49
US10761453B2Sep 1, 2020
Developing device, process cartridge, and image forming apparatus
CANON KK0 citations41
US10520884B2Dec 31, 2019
Cartridge and image forming apparatus
CANON KK0 citations41
UBE INDUSTRIES
4 patentsUS10781288B2Sep 22, 2020
Polyimide precursor and polyimide
UBE INDUSTRIES0 citations50
US9783640B2Oct 10, 2017
Polyimide precursor, polyimide, polyimide film, varnish, and substrate
UBE INDUSTRIES1 citations50
US10174166B2Jan 8, 2019
Polyimide precursor, polyimide, varnish, polyimide film, and substrate
UBE INDUSTRIES0 citations39
US9758623B2Sep 12, 2017
Polyimide precursor and polyimide
UBE INDUSTRIES0 citations36
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
3 patentsUS5691525ANov 25, 1997
Data transfer system and data transfer terminal device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD105 citations96
US5969332AOct 19, 1999
System for issuing and utilizing ticket
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84
US6772953B2Aug 10, 2004
Contactless data carrier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations71