Inventor
CHOI WOONGYONG
KR12 patents
Patents
12 patentsUS11209754B2Dec 28, 2021
Structure for selectively locking toner inlet shutter of toner refill portion
HEWLETT PACKARD DEVELOPMENT CO2 citations70
US11364725B2Jun 21, 2022
Authentication mechanisms
HEWLETT PACKARD DEVELOPMENT CO2 citations68
US11209747B2Dec 28, 2021
Dispensers with plungers
HEWLETT PACKARD DEVELOPMENT CO0 citations60
US11366407B2Jun 21, 2022
Structure to refill toner to development cartridge mounted in main body
HEWLETT PACKARD DEVELOPMENT CO1 citations59
US11204568B2Dec 21, 2021
Plunger locking structure in syringe type toner refill cartridge
HEWLETT PACKARD DEVELOPMENT CO0 citations59
US12282273B2Apr 22, 2025
Development device having rotatable wiper wiping optical surface of lens
HEWLETT PACKARD DEVELOPMENT CO0 citations58
US12235596B2Feb 25, 2025
Toner refill cartridge indicating whether toner has been discharged
HEWLETT PACKARD DEVELOPMENT CO0 citations54
US12111604B2Oct 8, 2024
Structure for mounting development cartridge in image forming apparatus
HEWLETT PACKARD DEVELOPMENT CO0 citations53
US11467517B2Oct 11, 2022
Toner refill cartridge with automatic refilling structure
HEWLETT PACKARD DEVELOPMENT CO0 citations51
US11231662B2Jan 25, 2022
Shutter structure for toner refill cartridge
HEWLETT PACKARD DEVELOPMENT CO0 citations50
US12547097B2Feb 10, 2026
Toner cartridge with waste toner dispersing member connected to and driven by toner transport member
HEWLETT PACKARD DEVELOPMENT CO0 citations49
US12393138B2Aug 19, 2025
Toner refill cartridge having structure in which driving force is transmitted through toner outlet
HEWLETT PACKARD DEVELOPMENT CO0 citations49