Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4239455 | Blade-mounted centrifugal pendulum | Willem Broekhuizen, Troy M. Gaffey, William D. Neathery | 1980-12-16 |
| 4239456 | Rotor blade out-of-plane centrifugal pendulums | Troy M. Gaffey, Willem Broekhuizen, William D. Neathery | 1980-12-16 |