Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6766004 | Method and apparatus for coordinating ringing and audio announcements in a phone system | — | 2004-07-20 |
| 6683939 | Method and apparatus for logging DTMF phone symbols dialed from an extension | Leonard D. Zuvela | 2004-01-27 |