Membership
Tour
Register
Log in
Ruixiang Hao
Follow
Person
Beijing, CN
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Negative voltage backflow direct current supply system for rail tra...
Patent number
10,744,880
Issue date
Aug 18, 2020
Beijing Efficiengine Technology LLC
Qionglin Zheng
B60 - VEHICLES IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
NEGATIVE VOLTAGE BACKFLOW DIRECT CURRENT SUPPLY SYSTEM FOR RAIL TRA...
Publication number
20180208063
Publication date
Jul 26, 2018
Beijing Efficiengine Technology LLC
Qionglin Zheng
B60 - VEHICLES IN GENERAL