Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873694 | Switching configuration for PCM time division multiplex telephone exchange having a central switching network and individual sub-switching networks | Alfred Jugel | 1989-10-10 |
| 4840349 | Device for actuating a throttle valve | Cornelius Peter, Uwe Schaper | 1989-06-20 |
| 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 | Gerhard Schaich, Wolfram Ernst | 1989-04-11 |
| 4798521 | System and method for regulating pressure in a container | Hans-Joachim Schumbert | 1989-01-17 |