Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11199092 | Hard rock roadway and tunnel boring machine with actively rotating hobs | Songyong Liu, Zhencai Zhu, Changlong Du | 2021-12-14 |
| 10981203 | Single-drive bidirectional-crawling pipe-cleaning robot | Songyong Liu, Qizhi Xie, Hongzhuang Wu, Cheng Cheng, Wei Li +4 more | 2021-04-20 |
| 10895153 | Vibrating type hard rock cutting mechanism with function of directional high-speed abrasive jet advanced slitting | Zhengwei Hu, Songyong Liu | 2021-01-19 |