Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5828731 | Method and apparatus for non-offensive termination of an outbound call and for detection of an answer of an outbound call by an answering machine | Aleksander Szlam | 1998-10-27 |
| 5581602 | Non-offensive termination of a call detection of an answering machine | Aleksander Szlam | 1996-12-03 |
| 4540855 | Detecting signals within a passband on a telephone line | Aleksander Szlam | 1985-09-10 |
| 4477698 | Apparatus for detecting pick-up at a remote telephone set | Aleksander Szlam | 1984-10-16 |