Shenzhen
China
4
2025-01-16
The entities that hold a legal rights for patent applications filed by inventor LIU Qingfeng:
Qingfeng LIU from Shenzhen, CN has applied for patents for these inventions. The list has both pending applications and granted patents:
SURGE PROTECTION CIRCUIT
#2 | 2018-12-27Switched-mode power supplies having burst mode operation for reduced power consumption
#3 | 2017-09-07Switch mode power supplies including primary side clamping circuits controlled based on secondary side signals
#4 | 2017-05-18Power factor correction stage control during start-up for efficient use of a negative temperature coefficient thermistor
1881278 ⎘