|
| US3950115 | 26 Nov 1974 | 13 Abr 1976 | Societe Nationale Industrielle Aerospatiale | Plastics rotor blade |
| US4077740 | 3 Ago 1976 | 7 Mar 1978 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland | Helicopter rotor blades |
| US4096012 | 30 Ago 1976 | 20 Jun 1978 | The Boeing Company | Method of forming a spar layup for an aerodynamic rotor blade |
| US4120610 | 16 May 1974 | 17 Oct 1978 | Textron, Inc. | Helicopter blade structure |
| US4247255 | 15 Mar 1979 | 27 Ene 1981 | The Boeing Company | Composite rotor blade root end |
| US4251309 | 5 Oct 1978 | 17 Feb 1981 | The United States of America as represented by the Secretary of the Army | Method of making rotor blade root end attachment |
| US4255087 | 5 Jun 1979 | 10 Mar 1981 | Messerschmitt-Bolkow-Blohm GmbH | Member formed of fiber-reinforced plastic material, such as a rotor blade |
| US4292009 | 18 Dic 1978 | 29 Sep 1981 | Messerschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftung | Hingeless rotor system |
| US4316700 | 3 Abr 1979 | 23 Feb 1982 | | Unitary, bonded-together helicopter rotorblade |
| US4339230 | 22 Abr 1980 | 13 Jul 1982 | Hercules Incorporated | Bifoil blade |
| US4382712 | 27 Jul 1981 | 10 May 1983 | Messerschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftung | Load transmitting connecting element with bolt eyes |
| US4452658 | 28 Dic 1981 | 5 Jun 1984 | | Method for making a helicopter rotor blade |
| US5181829 | 5 Abr 1991 | 26 Ene 1993 | Agusta S.p.A. | Helicopter blade |
| US5286167 | 27 Ene 1992 | 15 Feb 1994 | United Technologies Corporation | Spar-to-hub joint for a flexbeam helicopter rotor |
| US5340280 | 17 Nov 1993 | 23 Ago 1994 | General Electric Company | Dovetail attachment for composite blade and method for making |
| US5482584 | 14 Oct 1994 | 9 Ene 1996 | Deutsche Forschungsanstalt fur Luft- und Raumfahrt e.V. | Method for manufacturing rotor blades |
| US5632602 | 30 May 1995 | 27 May 1997 | Deutsche Forschungsanstalt fur Luft-und Ramfarht e.V. | Rotor blade |
| US7811061 | 14 Mar 2007 | 12 Oct 2010 | Eurocopter | Blade having an integral cuff, and a rotorcraft rotor provided with such a blade |
