Issued Patents All Time
Showing 1–25 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7103011 | Use of IP-multicast technology for 2-party calls in mobile communication networks | Surender Kumar, Mark L. Shaughnessy, James E. Mathis, Gregory A. Dertz | 2006-09-05 |
| 6930997 | Method and apparatus for processing services in communication system | Daniel J. McDonald, Mark L. Shaughnessy | 2005-08-16 |
| 6148204 | Method and apparatus for a distributed location register | Kamala D. Urs, Mark L. Shaughnessy | 2000-11-14 |
| 6134446 | Method and apparatus for subscriber unit location updating | Kamala D. Urs, Mark L. Shaughnessy | 2000-10-17 |
| 5862490 | Communication services needs of a communication unit supplied through simultaneous affiliation with multiple service providers in a communication system | Mark L. Shaughnessy, Stuart W. Thro | 1999-01-19 |
| 5835485 | Method for dynamic routing of communication messages | Gary W. Grube, Robert W. Furtaw | 1998-11-10 |
| 5724648 | Method of facilitating talkgroup communication in a peer-to-peer | Mark L. Shaughnessy, Daniel J. McDonald | 1998-03-03 |
| 5689810 | Method of facilitating tallgroup calls in a peer communication network | Mark L. Shaughnessy, Daniel J. McDonald | 1997-11-18 |
| 5682601 | Method for providing communication handoff in a multiple site communication system | — | 1997-10-28 |
| 5613207 | Method for transmitting messages in a communication system | Alan L. Wilson | 1997-03-18 |
| 5542108 | Method for processing communication requests | — | 1996-07-30 |
| 5535426 | Method and apparatus for moving primary control of a call in a multiple site communication system | Todd A. Leigh, John K. Hefferan | 1996-07-09 |
| 5513381 | Method for placing a communication group call in a multiple site trunked system | — | 1996-04-30 |
| 5502767 | Method for maintaining secure information synchronization on a control channel | Alan L. Wilson | 1996-03-26 |
| 5491835 | Method for maintaining audience continuity of a communication group call | John A. Wolfe | 1996-02-13 |
| 5483672 | Method for a communication unit that conserve source energy | — | 1996-01-09 |
| 5450611 | Fast channel access protocol for a two-way communication system | Michael J. Bonvallet, Gary W. Grube, Leslie G. Gustafson | 1995-09-12 |
| 5442809 | Method of assigning a voice/data channel as a temporary control channel in a radio communications system | Rafael Diaz, Marc C. Naddell, Gary W. Grube, Robin U. Roberts, Robert G. Adamczyk | 1995-08-15 |
| 5423066 | Method of responding to resource requests in a trunked communication system without call-handoff | — | 1995-06-06 |
| 5408683 | Method of anticipating a communication unit's location in a networked radio communications system | Sewim F. Ablay | 1995-04-18 |
| 5392458 | Trunked communication system with variable communication capability support for roamers | Richard H. Coe, Sewim F. Ablay | 1995-02-21 |
| 5349342 | Method for reclaiming unused system resources | Robert B. Nilles, Craig J. Collins, James J. Killigrew | 1994-09-20 |
| 5313655 | Method for reducing control channel activity for limited audience communications | — | 1994-05-17 |
| 5313653 | Method for a communication unit to maintain a data base of system services | — | 1994-05-17 |
| 5293638 | Intersystem communication system and method | Gary D. Erickson | 1994-03-08 |