Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5125024 | Voice response unit | Sedat I. Gokcen, Robert J. Perdue | 1992-06-23 |
| 4896346 | Password controlled switching system | William R. Belfield, William J. Erwin, Thomas J. Geers, Jr., Stephen W. Handy, Robert J. Perdue | 1990-01-23 |