Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7751976 | Rotary wing aircraft flight control system with a proximity cueing and avoidance system | Vineet Sahasrabudhe, Donald S. Anttila | 2010-07-06 |
| 7598888 | Rotary wing aircraft proximity warning system with a geographically based avoidance system | Donald S. Anttila | 2009-10-06 |
| D401898 | Variable diameter tilt rotor aircraft | Timothy Fred Lauder | 1998-12-01 |
| 5735670 | Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction (BVI) noise | Robert C. Moffitt, Evan A. Fradenburgh | 1998-04-07 |
| 5642982 | Retraction/extension mechanism for variable diameter rotors | Edward W. Gronenthal | 1997-07-01 |
| 5636969 | Torque tube/spar assembly for variable diameter helicopter rotors | Edward W. Gronenthal, W. Donald Jepson | 1997-06-10 |
| 4874292 | Apparatus for damping helicopter rotor blade oscillations | Donald L. Ferris | 1989-10-17 |
| 4695340 | Filament wound structure having filament wound reinforcing rings for use as a torque drive | — | 1987-09-22 |
| 4695341 | Filament wound structure for use as a torque drive | Evan A. Fredenburgh | 1987-09-22 |
| 4666753 | Filament wound structure for use as a torque drive | Evan A. Fradenburgh | 1987-05-19 |
| 4645423 | Tension/compression rod arrangement for damping helicopter rotor blade oscillations | Donald L. Ferris | 1987-02-24 |
| 4629644 | Filament wound structure having filament wound reinforcing rings for use as a torque drive | — | 1986-12-16 |