Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11961423 | Electronic shelf label positioning system and method, electronic shelf label and guide rail | Shiguo Hou, Jianguo Zhao, Min Liang, Le ZHUO, Yang Zhao +2 more | 2024-04-16 |
| 7609831 | Method for implementing wide area Centrex | Haiyin Ma, Lizheng Cao, Weijun Ma | 2009-10-27 |
| 7596212 | Method for a calling party to reinitiate a call in card number service | Haiyin Ma, Shengjun Xu, Deyong Li | 2009-09-29 |