Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11774220 | Annular shaped-charge housing for blasting and method of using the same | Fujiao Chu, Gongcheng Li, Zimin Ma, Zhihe LIU | 2023-10-03 |
| 11070665 | Voice over internet protocol processing method and related network device | Erli Ma | 2021-07-20 |