China Railway No.4 Group Co., Ltd

China

 
Total IP 7
Total IP Rank # 220,041
IP Activity Score 1.9/5.0    13
IP Activity Rank # 66,745

Patents

Trademarks

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Last Patent 2024 - Anchorage system for horizontal ...
First Patent 2021 - Dry desilting method for riverway

Latest Inventions, Goods, Services

2024 Invention Anchorage system for horizontal rotation of cable, and construction method. An anchorage system f...
Invention Top-down construction type assembly construction method for paved road surface. A top-down constr...
2023 Invention Variable cross-section intelligent bridge-building machine. A variable cross-section intelligent ...
2022 Invention Construction method for upper surface course made of steel slag-asphalt mixture. Provided in the ...
Invention Construction method for steel-concrete main girder of cable-stayed bridge. A construction method ...
2021 Invention Test device and method for measuring frictional resistance of thixotropic mud. A test apparatus a...
Invention Dry desilting method for riverway. A dry desilting method for a riverway. In a working process, a...