Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10576524 | Die capable of achieving rapid forming and quenching therein | Shijian Yuan, Zhubin He, Xiaobo Fan, Yanli Lin, Chang Qi | 2020-03-03 |
| 8271051 | Method and system for double-end talk detection, and method and system for echo elimination | — | 2012-09-18 |
| 6116800 | Propelling pencil | Guoyue Wang, Dianjun Wang | 2000-09-12 |