Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6731625 | System, method and article of manufacture for a call back architecture in a hybrid network with support for internet telephony | Paul D. Litzenberger, Shannon R. Orebaugh | 2004-05-04 |
| 5187740 | Method and apparatus for telephone call reorigination | Joe T. Swaim, Donald C. Heckman, Kenneth J. O'Grady | 1993-02-16 |