Chen's patent application

(1) On-site testing device for porosity ratio of deep saturated sand, authorized by national invention patent, February 8, 2008, by Chen, Liang Zhigang, Feng Wei, Chen, Chen Yun and Zhang, with publication number CN17314/kloc-0.

(2) Micro-pile secondary subsection grouting method, applying for national invention patent, Chen, Lin, Chen and Zhang Geqiang.

(3) Automatic testing device for groundwater level and conductivity, applying for national invention patent, by Chen, Chen, Wei Xu and Tang.

(4) Multi-point soil pore water conductivity automatic monitoring device, applying for national invention patent, Chen, Chen, Wei Xu,.

(5) Testing method and device for electromagnetic wave testing soil dielectric constant, applying for national invention patent, Chen, Wei Xu, Chen and Chen Wei.