Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864561 | Technique for improved subjective performance in a communication system using attenuated noise-fill | Robert C. Ashenfelter, Marco J. Bonomi | 1989-09-05 |
| 4797915 | Communication system having automatic call route selection | Adrian A. Giuliani, David F. Jones | 1989-01-10 |