Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11141773 | Device and method for strengthening thin-walled straight pipe | Yongfei Gu, Weipeng Liu, Lili Zhang, Chunxiang Zhang | 2021-10-12 |
| 11110504 | Method of forming thick-walled cylinder by spinning | Lili Zhang, Jiacheng Yu, Chunxiang Zhang | 2021-09-07 |