Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5724420 | Automatic call distribution with answer machine detection apparatus and method | — | 1998-03-03 |
| 4809272 | Telephone switching system with voice detection and answer supervision | Robert M. Zuranski | 1989-02-28 |