Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8203349 | Proximity and contact sensor and sensor element | Seiji Motojima, Makoto Takaki, Kenji Kawabe | 2012-06-19 |
| 8036369 | Method and system for realizing direct dialing to an extension across PBXs | Hanbing Chen | 2011-10-11 |
| 7710880 | Method and apparatus for security protection of service interruption in switch network | — | 2010-05-04 |