Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9167616 | System, apparatus and method for establishing a call from a mobile device | Michael Elizarov, Christopher E. Prest | 2015-10-20 |
| 8718019 | Method, system and apparatus for managing call handoff | Jerod Klink, Christopher E. Prest | 2014-05-06 |
| 8615280 | Error correction for DTMF corruption on uplink | Valentina Iquorevna Kramarenko, Zhigang Ruan | 2013-12-24 |
| 8606256 | DTMF signalling between mobile and server | Zhigang Ruan | 2013-12-10 |
| 8452291 | System and method for alternating between in-band and out-of-band communication path | Dapeng Gao, Abhinav Gupta, Alexander Shatsky | 2013-05-28 |
| 8423102 | Error correction for DTMF corruption on uplink | Valentina Iqorevna Kramarenko, Zhigang Ruan | 2013-04-16 |
| 8346235 | DTMF signalling between mobile and server | Zhigang Ruan | 2013-01-01 |
| 8233951 | Error correction for DTMF corruption on uplink | Valentina Iqorevna Kramarenko, Zhigang Ruan | 2012-07-31 |