Inventor

LIU YONGGANG

CN11 patents

⚠️ This page may combine multiple inventors who share the name “LIU YONGGANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHINA NAT PETROLEUM CORP

3 patents

US10196863B2Feb 5, 2019

Connection structure between pipe body and steel joint of aluminum alloy drill pipe

CHINA NAT PETROLEUM CORP0 citations47

US10036213B2Jul 31, 2018

Connection structure between pipe body and joint of aluminum alloy drill pipe

CHINA NAT PETROLEUM CORP0 citations46

US10184596B2Jan 22, 2019

Connection structure between pipe body and joint of aluminum alloy drill pipe

CHINA NAT PETROLEUM CORP0 citations36

LIU YONGGANG

2 patents

US8933600B2Jan 13, 2015

Brushless DC motor structure having a fan radiator for dissipating heat from the motor and the controller

LIU YONGGANG1 citations45

US9018808B2Apr 28, 2015

Rotor assembly

LIU YONGGANG0 citations33

CRRC QINGDAO SIFANG CO LTD

1 patent

US10730145B2Aug 4, 2020

Beam structure and hybrid welding method thereof

CRRC QINGDAO SIFANG CO LTD3 citations61

CHEN LIJUN

1 patent

US10406870B2Sep 10, 2019

Automatic locking device for snow skid chains

CHEN LIJUN1 citations57

NOKIA TECHNOLOGIES OY

1 patent

US12127051B2Oct 22, 2024

Device, method, apparatus and computer readable medium for inter-master node handover

NOKIA TECHNOLOGIES OY0 citations42

GUANGDONG TRAVELMALL HEALTH TECH CO LTD

1 patent

US10704545B2Jul 7, 2020

Electric inflator

GUANGDONG TRAVELMALL HEALTH TECH CO LTD0 citations36

Foshan Xianhu Laboratory

1 patent

US12476465B1Nov 18, 2025

Method for power distribution control in microgrid system integrating electricity, hydrogen, and ammonia, and device

Foshan Xianhu Laboratory0 citations35

XUZHOU XCMG DRIVELINE TECH CO LTD

1 patent

US11674570B1Jun 13, 2023

Self-adaptive heavy-duty gear transmission walking device

XUZHOU XCMG DRIVELINE TECH CO LTD0 citations35