QL

Qingfeng Liu

AL Astec International Limited: 2 patents #1 of 44Top 3%
IC Iflytek Co.: 1 patents #1 of 7Top 15%
UK University Of Kansas: 1 patents #30 of 93Top 35%
📍 Qingdao, CA: #6 of 29 inventorsTop 25%
Overall (2019): #31,274 of 560,194Top 6%
5
Patents 2019

Issued Patents 2019

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
10355601 Switched-mode power supplies having burst mode operation for reduced power consumption Jun Liu, Xun Gong, Zhe Li 2019-07-16
10339428 Intelligent scoring method and system for text objective question Yulong Hu, Yintian Zhang, Bo Chen Zhu, Si Wei, Guoping Hu +1 more 2019-07-02
10340787 Power factor correction stage control during start-up for efficient use of a negative temperature coefficient thermistor Jun Liu, Zhaotu Fan, Zhe Li 2019-07-02
10224499 Biomolecule-carbon nanostructure nanocomposites for optoelectronic devices Judy Z. Wu, Youpin Gong 2019-03-05
10212824 Gold-plating etching process for 5G communication high-frequency signal boards Jiting Liu 2019-02-19