Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6775269 | Method and system for routing telephone calls between a public switched telephone network and an internet protocol network | Casimir M. Kaczmarczyk, Sivakumar Ravikumar, George A. Cowgill, Bo-Hun Chen, Atousa Raissyan +1 more | 2004-08-10 |