Inventor

LIU CONGWEI

CA4 patents

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

ROCKWELL AUTOMATION TECH INC

2 patents

US7495938B2Feb 24, 2009

DC voltage balance control for three-level NPC power converters with even-order harmonic elimination scheme

ROCKWELL AUTOMATION TECH INC100 citations94

US7310254B2Dec 18, 2007

AC-to-AC (frequency) converter with three switches per leg

ROCKWELL AUTOMATION TECH INC7 citations71

CHINA NAT PETROLEUM CORP

1 patent

US11125898B2Sep 21, 2021

Method and system for positioning seismic source in microseism monitoring

CHINA NAT PETROLEUM CORP0 citations44

TSINGTAO UNIV OF SCIENCE & TECHNOLOGY

1 patent

US12188909B2Jan 7, 2025

Testing and characterization for initial fatigue damage and development process of vulcanized rubber

TSINGTAO UNIV OF SCIENCE & TECHNOLOGY0 citations37