Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4326143 | Piezoelectric acceleration pick-up | Werner Guth, Hanspeter Dahler, Reto Calderara | 1982-04-20 |
| 4314481 | Piezeolectric strain transducer | Hans-Rudolf Derrer, Max Vollenweider, Hans C. Sonderegger | 1982-02-09 |