Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680442 | Voice mail communication with call blocking | Robert D. Farris | 1997-10-21 |
| 5661782 | Voice mail communication with call blocking | Robert D. Farris | 1997-08-26 |
| 5631948 | Voice mail communication with call blocking | Robert D. Farris | 1997-05-20 |
| 5592477 | Video and TELCO network control functionality | Robert D. Farris | 1997-01-07 |