Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6839555 | Method and apparatus for supporting voice message services with automatic rebound in a wireless intelligent network | Robert Thomas Calabrese, Tracy Edwin III East, John Mitchell Rendak, Robert John Zurawski | 2005-01-04 |
| 5396542 | Method for use by a telecommunications system in enabling improved attendant services | Steven L. Greenspan | 1995-03-07 |