using higher-harmonic control [HHC]

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Patents Grantslast 30 patents

Information Patent Grant
Dual higher harmonic control (HHC) for a counter-rotating, coaxial...
- Patent number 7,648,338
- Issue date Jan 19, 2010
- Sikorsky Aircraft Corporation
- William A. Welsh
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Helicopter rotor blade control device
- Patent number 6,099,254
- Issue date Aug 8, 2000
- ZF Luftfahrttechnik GmbH
- Achim Blaas
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Method and device for reducing the effect of the vibration generate...
- Patent number 5,895,012
- Issue date Apr 20, 1999
- Eurocopter France
- Thomasz Krysinski
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Method and device for the reduction of the oscillations of a diverg...
- Patent number 5,242,130
- Issue date Sep 7, 1993
- Aerospatiale Societe Nationale Industrielle
- Rene L. Mouille
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
3031017
- Patent number 3,031,017
- Issue date Apr 24, 1962
- B64 - AIRCRAFT AVIATION COSMONAUTICS