Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10625954 | Device and method for grabbing and storing two-dimensional code card | Zonggeng Xu, Qiang Zhang | 2020-04-21 |
| 8675956 | Method and system for verifying making time of a file by computer | Daihua Xu, Yanjun Guan | 2014-03-18 |