Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4552996 | Method and apparatus for evaluating noise level on a telephone channel | — | 1985-11-12 |
| 4469916 | Method and apparatus for detecting signalling and data signals on a telephone channel | Jean-Claude Spiteri | 1984-09-04 |