Inventor
LIU GUOQIANG
CN39 patents
⚠️ This page may combine multiple inventors who share the name “LIU GUOQIANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
COLGATE PALMOLIVE CO
15 patentsUSD961269SAug 23, 2022
Oral care implement
COLGATE PALMOLIVE CO22 citations94
USD956424SJul 5, 2022
Refill head for a toothbrush
COLGATE PALMOLIVE CO16 citations94
USD955753SJun 28, 2022
Refill head for a toothbrush
COLGATE PALMOLIVE CO14 citations94
USD987299SMay 30, 2023
Oral care implement handle
COLGATE PALMOLIVE CO4 citations86
USD950957SMay 10, 2022
Oral care implement handle
COLGATE PALMOLIVE CO4 citations84
USD925925SJul 27, 2021
Toothbrush
COLGATE PALMOLIVE CO5 citations83
USD1079271SJun 17, 2025
Oral care implement handle
COLGATE PALMOLIVE CO1 citations75
USD1048724SOct 29, 2024
Refill head for a toothbrush
COLGATE PALMOLIVE CO3 citations75
USD1048723SOct 29, 2024
Refill head for a toothbrush
COLGATE PALMOLIVE CO2 citations73
USD1037671SAug 6, 2024
Toothbrush
COLGATE PALMOLIVE CO1 citations72
USD1020261SApr 2, 2024
Toothbrush
COLGATE PALMOLIVE CO1 citations72
USD934568SNov 2, 2021
Toothbrush
COLGATE PALMOLIVE CO3 citations72
USD1026469SMay 14, 2024
Oral care implement
COLGATE PALMOLIVE CO2 citations70
US12383049B2Aug 12, 2025
Oral care implement
COLGATE PALMOLIVE CO0 citations62
USD1079274SJun 17, 2025
Oral care implement
COLGATE PALMOLIVE CO0 citations62
JOULWATT TECH CO LTD
8 patentsUS12294301B2May 6, 2025
Power supply circuit and light-emitting diode (LED) driving system using power supply circuit
JOULWATT TECH CO LTD1 citations59
US12119749B2Oct 15, 2024
Flyback converter, constant-current control method, and lighting system
JOULWATT TECH CO LTD0 citations58
US12598680B2Apr 7, 2026
Lighting control circuit, lighting control method, and lighting circuit
JOULWATT TECH CO LTD0 citations51
US12471194B2Nov 11, 2025
Driving control circuit of power transistor, lighting control circuit and lighting circuit
JOULWATT TECH CO LTD0 citations51
US12484121B2Nov 25, 2025
Lighting circuit and control method thereof
JOULWATT TECH CO LTD0 citations47
US11895751B2Feb 6, 2024
Leakage protection circuit and dimming drive circuit
JOULWATT TECH CO LTD0 citations47
US11895747B2Feb 6, 2024
Illumination device, LED driver circuit, bleeder control circuit and control method
JOULWATT TECH CO LTD0 citations47
US11805581B2Oct 31, 2023
Buffer circuit for light emitting diode (LED) drive circuit, and LED drive circuit and control method thereof
JOULWATT TECH CO LTD0 citations47
JOULWATT TECH HANGZHOU CO LTD
5 patentsUS10153684B2Dec 11, 2018
Bleeder circuit
JOULWATT TECH HANGZHOU CO LTD37 citations92
US10143051B2Nov 27, 2018
Bleeder circuit and control method thereof, and LED control circuit
JOULWATT TECH HANGZHOU CO LTD7 citations84
US11563381B2Jan 24, 2023
Control method of switching circuit, control circuit of switching circuit, and switching circuit
JOULWATT TECH HANGZHOU CO LTD0 citations52
US10506684B2Dec 10, 2019
Protection circuit and illumination driving circuit
JOULWATT TECH HANGZHOU CO LTD0 citations42
US10327296B2Jun 18, 2019
Dimming circuit, dimming method and LED driving circuit
JOULWATT TECH HANGZHOU CO LTD0 citations40
HUAWEI TECH CO LTD
3 patentsUS11949148B2Apr 2, 2024
NFC antenna and electronic apparatus
HUAWEI TECH CO LTD0 citations58
US12498791B2Dec 16, 2025
Method, device, and medium for content transmission based on gesture operation
HUAWEI TECH CO LTD0 citations51
US11893302B2Feb 6, 2024
Content transmission method and terminal device
HUAWEI TECH CO LTD0 citations45