Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4430594 | Device for contacting tubular piezo-electric transducers | Rolf Humbs, Karl Trey | 1984-02-07 |
| 4371881 | Pivotable ink-repelling screen for the writing head of an ink recording device | Alfred Rueckerl | 1983-02-01 |