Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5812548 | Communication system, a private automatic branch exchange, and a line card | Heert R. Kamstra | 1998-09-22 |
| 5450396 | Communication system and a private branch exchange to be used in such a communication system | — | 1995-09-12 |
| 5418838 | Communications system, switching exchange and line card | Joannes P. M. Van Kleef | 1995-05-23 |
| 5297145 | Digital subscriber line circuit for connecting an | — | 1994-03-22 |
| 4486878 | Digital telephone exchange with means for processing packet-switched data | — | 1984-12-04 |