Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4250561 | Apparatus for receiving and/or delivering signalling characters each having a plurality of polarity changes | Friedrich Papendieck, Guenther Kerschner, Rolf-Peter Verfuerth | 1981-02-10 |