Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4638123 | Circuit arrangement for a small PABX with a switching matrix that has electronic crosspoints | Alois Altendorfer, Wolfgang Mueller | 1987-01-20 |
| 4187414 | Circuit arrangement for an interference data alarm system in communication facilities, particularly in telephone equipment | Franz Fahrenschon, Heinz Huettl | 1980-02-05 |