Patents/Inventors

Xianfeng Zhao

HenanCN2 patents

3 Patents

US123718692025
Grouting Pipe with Vibration Function
SAFEKEY Engineering Technology (Zhengzhou), Ltd.
0 cites
US121523602024
Vibratory Grouting Drilling Rig with Auxiliary Moving Mechanism
SAFEKEY Engineering Technology (Zhengzhou), Ltd.
0 cites
US115980652023
Method for Stabilizing and Lifting Channel Boards by Underwater Grouting
SAFEKEY Engineering Technology (Zhengzhou), Ltd.
0 cites