Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5904013 | Overlapped alerting in wide area call forwarding | Steven L. Greenspan, Robert S. Hisiger, Richard H. Janow | 1999-05-18 |
| 5539451 | Method and apparatus for channel spinning off a channel | John Carey | 1996-07-23 |