Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7933608 | Methods, systems, and computer program products for providing presence gateway functionality in a telecommunications network | Aziz A. Tejani, Richard E. Schaedler, Venkataramaiah Ravishankar, Joe E Defenderfer, Larry Gene Slate +1 more | 2011-04-26 |
| 7146181 | Methods and systems for delivering presence information regarding push-to-talk subscribers | Richard E. Schaedler, Larry Gene Slate, Aziz A. Tejani | 2006-12-05 |
| 6731738 | Call tones in communication networks | Chaoxin Qiu, Shannon P. Silvus, Michael J. Gettles, William Douskalis | 2004-05-04 |
| 6728362 | Continuity testing with call tone messaging in communication networks | Chaoxin Qiu, Shannon P. Silvus, Michael J. Gettles, William Douskalis | 2004-04-27 |
| 5138657 | Method and apparatus for controlling a digital crossconnect system from a switching system | John R. Colton, Charles D. Gavrilovich, John J. Kulzer, Reinhard Metz, Larry A. Russel +1 more | 1992-08-11 |