Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4582956 | Method and apparatus for displaying at a selected station special service information during a silent interval between ringing | — | 1986-04-15 |
| 4551581 | Method and apparatus for sending a data message to a selected station during a silent interval between ringing | — | 1985-11-05 |