Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4360337 | Damping device for a helicopter rotor blade | Ludwig Stangl | 1982-11-23 |
| 4344739 | Hingeless and bearingless multiblade rotor for rotary wing aircraft | Hans Derschmidt | 1982-08-17 |