Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4288662 | Circuit arrangement for telephone exchange systems, especially subscriber extension station installations, with additional data traffic, for example with teleprinter equipment | Alfred Meier, Hans Thinschmidt | 1981-09-08 |
| 4187414 | Circuit arrangement for an interference data alarm system in communication facilities, particularly in telephone equipment | Heinz Huettl, Ewald Dotzauer | 1980-02-05 |