Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11459723 | Anchor rod for positioned grouting suitable for prevention and control of engineering seepage damage and construction method thereof | Lisha Zhang, Xiao Wei, Hongwei Ying, Jinhong Zhang, Gang Wei +2 more | 2022-10-04 |
| 11225768 | Drainage grouting pipe and method of use thereof | Lisha Zhang, Jinhong Zhang, Xiao Wei, Hongwei Ying, Changju Zhang +2 more | 2022-01-18 |