Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5620303 | Rotor system having alternating length rotor blades for reducing blade-vortex interaction (BVI) noise | Joseph A. Visintainer | 1997-04-15 |
| 5620304 | Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction (BVI) noise | David G. Matsuka, Edward W. Gronenthal | 1997-04-15 |