| 9973545 |
Method and device for managing circuit switched data calls |
Vimal Patel, James Ibezim |
2018-05-15 |
| 8787360 |
Method and apparatus for processing multiple services per call |
John Carl Brown, Robert Yaeger Peters, Jr., Mark A. Ratcliffe, Harish Samarasinghe |
2014-07-22 |
| 8700786 |
Systems and methods for termination of session initiation protocol |
James R. Dobbins, Mark A. Ratcliffe |
2014-04-15 |
| 8239554 |
Systems and methods for termination of session initiation protocol |
James R. Dobbins, Mark A. Ratcliffe |
2012-08-07 |
| 8121274 |
Method and apparatus for processing multiple services per call |
John Carl Brown, Robert Yaeger Peters, Jr., Mark A. Ratcliffe, Harish Samarasinghe |
2012-02-21 |
| 7920542 |
Method and apparatus for providing secure voice/multimedia communications over internet protocol |
Harbir S. Brar, Kevin B. Kealy, William Todd Marshall, Israel Rosencrantz, Rachel Rosencrantz +1 more |
2011-04-05 |
| 7804822 |
Method and apparatus for detecting subscriber service address change |
Brian Freeman, Jay Gabin, Daryl Goins, Galia Merhav, Lina O'Connor +1 more |
2010-09-28 |
| 7657015 |
Method and apparatus for processing multiple services per call |
John Carl Brown, Robert Yaeger Peters, Jr., Mark A. Ratcliffe, Harish Samarasinghe |
2010-02-02 |
| 7366782 |
Systems and methods for termination of session initiation protocol |
James R. Dobbins, Mark A. Ratcliffe |
2008-04-29 |
| 6377674 |
Method for global title translation processing |
Robert Yaeger Peters, Jr., Mark A. Ratcliffe |
2002-04-23 |
| 6205557 |
Redundant call processing |
Martin Dolly, Andrew R. Jacob, Carolyn Roche Johnson, Wonseok Lee, David Lewis +2 more |
2001-03-20 |