Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7444131 | Method and apparatus for rerouting terminations for CALEA targets through a predetermined surveilling MSC | Ruth Gayde | 2008-10-28 |
| 7236791 | Radio channel allocation for national security and emergency preparedness calls | Michael D. Chambers, Renling Lawrence Huang, Ismael Lopez, Rafael Quintero | 2007-06-26 |
| 7142857 | Apparatus, method and system for maintaining call control at a gateway mobile switching center utilizing a packet network | Robert Thomas Calabrese, Thomas Edward Hudepohl, Robin Jeffrey Thompson | 2006-11-28 |
| 7113787 | Wireless priority service for intersystem call delivery | Michael D. Chambers, Bonnie Marie Hitzeman, Rafael Quintero | 2006-09-26 |
| 6236857 | Methods and apparatus for accessing enhanced wireless services platforms via the public switched telephone network | Robert Thomas Calabrese, Nicholas Gnesda, Jeffrey Arthur Zahnle | 2001-05-22 |
| 6131025 | Method for providing ubiquitous service to mobile subscribers using a wireless gateway switch | Jeffrey Arthur Zahnle | 2000-10-10 |
| 5381464 | Serving cellular calls to stations at the boundary between switch serving areas | Julia A. O'Keefe, Kenneth Wayne Shelhamer | 1995-01-10 |
| 4577066 | Telephone interexchange call routing | Brian R. Bimonte, Mark A. Gauldin | 1986-03-18 |
| 4565903 | Telephone interexchange carrier selection | — | 1986-01-21 |