Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5125024 | Voice response unit | Sedat I. Gokcen, Roy V. Grubbe | 1992-06-23 |
| 5003574 | Voice capture system | Dong L. Denq, Linda Mattson, Eugene L. Rissanen | 1991-03-26 |
| 4896346 | Password controlled switching system | William R. Belfield, William J. Erwin, Thomas J. Geers, Jr., Roy V. Grubbe, Stephen W. Handy | 1990-01-23 |