Issued Patents All Time
Showing 1–3 of 3 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, Klaus Eberlein, Fritz Hlawa | 1990-02-13 |
| 4821256 | Method for monitoring information transmission in connected through four-wire connecting paths, more particularly semipermanently connected through connecting paths in digital time multiplex exchanges | Lothar Schmidt, Wolfram Ernst | 1989-04-11 |
| 4763316 | Circuit arrangement for centrally controlled time division multiplex telecommunication exchange facilities | Ludwig Schoenauer | 1988-08-09 |