Inventor
AHN SUNGCHUL
KR7 patents
Patents
7 patentsUS11209762B2Dec 28, 2021
Method for error handling in the toner refill process
HEWLETT PACKARD DEVELOPMENT CO6 citations81
US11294301B2Apr 5, 2022
Detecting toner injection amount of toner refill cartridge
HEWLETT PACKARD DEVELOPMENT CO3 citations70
USD907698SJan 12, 2021
Development cartridge for a printer
HEWLETT PACKARD DEVELOPMENT CO0 citations60
US12181805B2Dec 31, 2024
Method for error handling in the toner refill process
HEWLETT PACKARD DEVELOPMENT CO0 citations59
US11892781B2Feb 6, 2024
Method for error handling in the toner refill process
HEWLETT PACKARD DEVELOPMENT CO0 citations59
US11294303B2Apr 5, 2022
Toner refill cartridge with pulverization member activated by elastic force
HEWLETT PACKARD DEVELOPMENT CO0 citations48
US12572099B2Mar 10, 2026
Control of drive unit according to detection of amount of toner in toner refill cartridge
HEWLETT PACKARD DEVELOPMENT CO0 citations45