Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6094480 | Ring trip detector | Tsuyoshi Ueshima, Serdar Kiykioglu, Mark A. Bolla | 2000-07-25 |
| 4899379 | Circuit arrangement for the connection of line circuits of a digital time multiplex-telephone network | — | 1990-02-06 |