Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12444395 | Composite damping lightweight sound insulation wall | Longxu Xie, Xiaofei Qian, Licheng ZHANG, Zhiwu HAN | 2025-10-14 |
| 9745809 | Liner hanger top packer | Huian Yi, Bingzhou Tian, Shanyin Chen, Baisong Ding, Zhien Zan +4 more | 2017-08-29 |