| Patents for B64C 11 - Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft (3,644) |
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| 12/16/1980 | US4239454 Overload protection control circuit for marine engines |
| 11/12/1980 | EP0018820A1 Ducted-propeller aircraft |
| 10/29/1980 | EP0018114A1 Thrust devices |
| 10/14/1980 | US4227860 Aircraft propeller pitch control |
| 05/27/1980 | CA1078358A1 Propeller hub and blade crack detection |
| 05/13/1980 | US4202655 Propeller fan blading and hub therefor |
| 05/13/1980 | US4202518 Air-borne support and lift mechanism adapted to aircraft |
| 03/04/1980 | US4191506 Propeller and impeller constructions |
| 12/18/1979 | US4179241 Full feathering, reversible pitch, constant RPM propeller |
| 11/06/1979 | US4173321 Vehicle for traveling in the air and on the ground equipped with hydraulically driven propellers |
| 10/23/1979 | US4171784 Combination road and air vehicle having a lowerable chassis |
| 10/16/1979 | US4171183 Multi-bladed, high speed prop-fan |
| 07/03/1979 | CA1057720A1 Propulsion apparatus |
| 03/06/1979 | US4142697 Mechanism for synchronously varying diameter of a plurality of rotors and for limiting the diameters thereof |
| 02/27/1979 | US4141664 Rotary blade retention system |
| 02/13/1979 | CA1048472A1 Rotary blade retention system |
| 01/30/1979 | US4136845 Hydraulically operated aircraft with a retractable propeller |
| 01/09/1979 | CA1045981A1 Impact absorbing blade mounts for variable pitch blades |
| 01/02/1979 | US4132503 Variable-pitch propeller |
| 12/19/1978 | US4130378 Side propellers for the propulsion of fast boats and aircraft |
| 11/07/1978 | US4124330 Cam-operated pitch-change apparatus |
| 09/12/1978 | US4113205 Aerodynamic lifting mechanisms |
| 08/08/1978 | US4105817 Fiber-reinforced plastic, for use as a fluid foil shell |
| 06/27/1978 | US4097189 Aircraft propeller and blade pitch control system |
| 04/04/1978 | US4082378 Deformable bearing seat |
| 03/21/1978 | US4080097 Locking control and overtravel safety stop system for variable length rotor blades |
| 02/28/1978 | US4076453 Bearing ring for blade of a controllable pitch propeller |
| 02/21/1978 | US4074952 Locking control and overtravel safety stop system for variable length rotor blades |
| 09/27/1977 | US4050848 Hydro seal retainer |
| 09/27/1977 | US4050827 Force transmitting structural member |
| 09/13/1977 | US4047840 Impact absorbing blade mounts for variable pitch blades |
| 09/06/1977 | US4046435 Bearing seat usable in a gas turbine engine |
| 09/06/1977 | US4046434 Deformable bearing seat |
| 07/26/1977 | US4037986 Bladed rotors having control means for effecting blade pitch adjustment |
| 06/14/1977 | US4029435 Retractable blade for a helicopter rotor |
| 06/14/1977 | US4029434 Variable pitch mounting for airfoil blades of a windmill or propeller |
| 03/01/1977 | US4009849 Fluid-stream driven aircraft |
| 02/15/1977 | US4007997 Rotor diameter indicator |
| 08/10/1976 | US3973873 Negative torque sensor for a gas turbine engine |
| 07/06/1976 | US3967996 Method of manufacture of hollow pieces |
| 06/22/1976 | US3964839 Pitch change mechanism |
| 06/08/1976 | US3962506 Multi-chambered cellular structure and method for manufacture |
| 05/18/1976 | US3957229 Convertible auxiliary turbine for aircraft |
| 01/27/1976 | US3934410 Quiet shrouded circulation control propeller |