Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6421442 | Method of enhancing call processing in a number portability environment | Lev Slutsman, Kamlesh T. Tewani | 2002-07-16 |
| 6259783 | Method of enhancing call processing in a number portability environment | Kamlesh T. Tewani | 2001-07-10 |
| 6233331 | Method of enhancing call processing in a number portability environment | Lev Slutsman, Kamlesh T. Tewani | 2001-05-15 |
| 6058313 | Method of enhancing call processing in a number portability environment | Lev Slutsman, Kamlesh T. Tewani | 2000-05-02 |
| 5943411 | Method for routing an NP call | David J. Houck, Lev Slutsman, Kamlesh T. Tewani | 1999-08-24 |