Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4901347 | Circuit arrangement for telecommunication switching systems, particularly PCM-time-division multiplex telephone switching systems with a central matrix and with local sub-switching matrices connected to the same | Lothar Schmidt, Gerhard Schaich, Fritz Hlawa | 1990-02-13 |
| 4605824 | Circuit arrangement for telecommunication exchange systems, particularly telephone exchange systems with switch facilities for emitting signals | Josef Birlmeier, Werner Nagler | 1986-08-12 |