Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8000681 | System and method for managing communication records | — | 2011-08-16 |
| 7880945 | Hologram projection screen and its manufacturing method and system as well as its applications | Zhisen Cai, Chonglai Ke | 2011-02-01 |