Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7720082 | System and method for short message service and instant messaging continuity | Sharon Fridman, Ben Volach, Ran Makavy, Brian Rosen, Thomas C. Ely | 2010-05-18 |
| 6535746 | Method and apparatus supporting short message services in a wireless number portability environment | May Y. Chan | 2003-03-18 |
| 6445785 | Methods and apparatus for local number portability in telecommunication systems | May Y. Chan, Blayne Maring, David Wang | 2002-09-03 |
| 6338140 | Method and system for validating subscriber identities in a communications network | Leslie Dale Owens, Mark S. Plecity, Alvah B. Davis, David T. Kiswani | 2002-01-08 |
| 6240296 | Method and apparatus for supporting short message services in a wireless number portability environment | May Y. Chan | 2001-05-29 |
| 6192241 | Worldwide wireless subscriber access service | Jeffrey L. Crollick | 2001-02-20 |
| 5787347 | Method and apparatus for selecting a cellular system for communication with a cellular telephone in a roaming area | Daniel Borkowski, Kenneth Chao | 1998-07-28 |
| 5764745 | Apparatus and method for local number portability using nongeographic subscriber numbers | May Y. Chan, Arthur Anthony Giordano | 1998-06-09 |
| 5204902 | Cellular telephony authentication arrangement | James Alexander Reeds, III, Philip Andrew Treventi | 1993-04-20 |
| 5018187 | Mobile telephone intrasystem and intersystem enhanced handoff method and apparatus for limiting trunk switching connections | John A. Marinho, Steven James Pilgrim | 1991-05-21 |