Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874292 | Apparatus for damping helicopter rotor blade oscillations | David G. Matuska | 1989-10-17 |
| 4804315 | Composite helicopter swashplate | Francis E. Byrnes, Lawrence Varholak | 1989-02-14 |
| 4797064 | Composite helicopter rotor hub | Francis E. Byrnes | 1989-01-10 |