ZHANG; Guangchao

Patent Applications and Registrations

Patent applications and USPTO patent grants for ZHANG; Guangchao.The latest application filed is for "tetrahydroisoquinoline derivatives, preparation process and use thereof".

Company Profile

3.12.13

ZHANG; Guangchao - Chengdu Sichuan
Zhang; Guangchao - Qingdao CN
Zhang; Guangchao - San Jose CA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Tetrahydroisoquinoline Derivatives, Preparation Process And Use Thereof App 20210052576 - WU; Yongyong ; et al.	2021-02-25
Reverse rotary sprinkler drilling pipe system with anti-sticking function and its application method Grant 10,794,136 - Tan , et al. October 6, 2	2020-10-06
A Reverse Rotary Sprinkler Drilling Pipe System with Anti-sticking Function and Its Application Method App 20200024925 - TAN; Yunliang ; et al.	2020-01-23
Control circuit for power converter with isolated or non-isolated feedback Grant 10,355,603 - Lin , et al. July 16, 2	2019-07-16
Control circuits and control methods for power converters Grant 10,277,131 - Zhang , et al.	2019-04-30
Control Circuits And Control Methods For Power Converters App 20180054109 - ZHANG; Guangchao ; et al.	2018-02-22
Control Circuit For Power Converter With Isolated Or Non-isolated Feedback App 20180054131 - LIN; Mao-Sheng ; et al.	2018-02-22
PFC control circuit, digital PFC circuit and the method thereof Grant 9,812,950 - Lu , et al. November 7, 2	2017-11-07
Digitally controlled PFC converter with multiple discontinuous modes Grant 9,621,028 - Lin , et al. April 11, 2	2017-04-11
Pfc Control Circuit, Digital Pfc Circuit And The Method Thereof App 20150364988 - Lu; Wenbin ; et al.	2015-12-17
Power Factor Correction Circuit With Digital Control Scheme And Associated Control Method App 20150303790 - Lin; Sicong ; et al.	2015-10-22
Smooth mode transition plateau for a power supply controller Grant 8,994,351 - Zhang March 31, 2	2015-03-31
Sample and hold buffer Grant 8,929,102 - Zhang January 6, 2	2015-01-06
Power controller with smooth transition to pulse skipping Grant 8,823,353 - Zhang , et al. September 2, 2	2014-09-02
Variable frequency timing circuit for a power supply control circuit Grant 8,665,620 - Baurle , et al. March 4, 2	2014-03-04
Variable Frequency Timing Circuit For A Power Supply Control Circuit App 20130336021 - Baurle; Stefan ; et al.	2013-12-19
Sample And Hold Buffer App 20130336022 - ZHANG; Guangchao	2013-12-19
Power Controller With Smooth Transition To Pulse Skipping App 20130100714 - Zhang; Guangchao ; et al.	2013-04-25
Smooth Mode Transition Plateau For A Power Supply Controller App 20130033902 - Zhang; Guangchao	2013-02-07

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