Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621854 | Method and apparatus for objective speech quality measurements of telecommunication equipment | — | 1997-04-15 |
| 5341420 | Noise-cancelling handset | Kevin Welsby | 1994-08-23 |