Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11097925 | Device for cage jamming buffer of large-tonnage hoisting system of ultra-deep shaft | Guohua Cao, Zhencai Zhu, Ying Wang, Ke Wang, Chunli Hua +6 more | 2021-08-24 |
| 10913636 | Device and method for adjusting tension of a steel wire rope of an ultra-deep vertical shaft at a hoisting-container-end | Guohua Cao, Lifei Jiang, Zhencai Zhu, Weihong Peng, Chunli Hua +4 more | 2021-02-09 |