Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5469441 | Digital telephone communication system including an exchange and a service station connected thereto for supplying programming information to user stations by way of the B channels of the system | Piet B. Hesdahl | 1995-11-21 |
| 5031207 | Method of establishing a data link between a pair of terminals as well as a terminal which is suitable for implementing this method | Piet B. Hesdahl, Sijtze Van Der Velde, Gijsbertus M. Besselsen | 1991-07-09 |