Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7567797 | Data application-triggered call volume management | Douglas William Varney | 2009-07-28 |
| 7313375 | Follow-me broadcast reception method and system | John Voelker | 2007-12-25 |
| 7242948 | Providing location based directory numbers for personalized services | Wolfgang Fleischer, Zhibi Wang | 2007-07-10 |
| 7212506 | System for the secure distribution of priority call access codes to provide guaranteed wireless communication service to priority wireless communication subscribers | Douglas William Varney | 2007-05-01 |
| 7209947 | Data network-assisted conference establishment | Douglas William Varney | 2007-04-24 |
| 7158798 | Location-based ad-hoc game services | Douglas William Varney, Jie Zhou | 2007-01-02 |
| 7013125 | Replenishment of prepaid accounts during multimedia sessions | Eric Harold Henrikson | 2006-03-14 |
| 6882838 | System and method for providing dynamic call disposition service to wireless terminals | Douglas William Varney | 2005-04-19 |
| 6870916 | Targeted and intelligent multimedia conference establishment services | Eric Harold Henrikson, Stinson Mathai, Donna Michaels Sand | 2005-03-22 |
| 6775368 | Seamless data network telecommunication service during mobile wireless call handoff | Douglas William Varney | 2004-08-10 |
| 6724732 | Dynamic adjustment of timers in a communication network | Robert J. Abrams, Young-fu Chang, Jaap T. Erne, Stuart Mandel Garland, John Andrew Johnson +4 more | 2004-04-20 |
| 6683871 | Internet protocol telephony | Milo Orsic, Werner Ulrich | 2004-01-27 |
| 6539225 | Seamless data network telecommunication service during mobile wireless call handoff | — | 2003-03-25 |
| 6360265 | Arrangement of delivering internet protocol datagrams for multimedia services to the same server | Keith F. Falck | 2002-03-19 |
| 6317042 | Automated emergency announcement system | Sandi LaVonne Engelhorn, Zhibi Wang | 2001-11-13 |
| 6272358 | Vocoder by-pass for digital mobile-to-mobile calls | Kenneth W. Brent, Michael D. Chambers, Anne Yin-Fee Lee | 2001-08-07 |
| 6198738 | Communications between the public switched telephone network and packetized data networks | Young-fu Chang, John Paul Kozik | 2001-03-06 |
| 5771283 | Method for delivering enhanced caller identification service in a telecommunications network | Young-fu Chang | 1998-06-23 |
| 5590176 | Arrangement for local trunk hunting in a distributed switching system | Anjana Agarwal | 1996-12-31 |
| 5329573 | Arrangement for obtaining authentication key parameters in a cellular mobile telecommunications switching network | Cheng-Tze Chang, Yie-de Zhu | 1994-07-12 |
| 5309501 | Arrangement for detecting fraudulently identified mobile stations in a cellular mobile telecommunications network | Jack Kozik, Dennis J. Wiest | 1994-05-03 |
| 4899373 | Method and apparatus for providing personalized telephone subscriber features at remote locations | Stephen A. McGaw | 1990-02-06 |