Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8031708 | Methods and apparatus for dual-tone multi-frequency signal analysis within a media over internet protocol network | Xiaomin Lu, Simon Arthur Oakley, Christopher Michael Sherwin, David E. Sturtevant | 2011-10-04 |