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| Patents for B64C 27 - Rotorcraft; Rotors peculiar thereto (10,112) |
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| 04/13/1976 | US3950115 Plastics rotor blade | | 03/23/1976 | US3945628 Nodal beam inertial flexure | | 03/23/1976 | US3945256 Helicopter rotor balancing apparatus and method | | 03/09/1976 | US3942910 Grip-yoke assembly with a redundant centrifugal load support | | 03/09/1976 | US3942387 Replaceable freewheel unit for helicopters | | 03/02/1976 | US3941503 Helicopter rotor hub provided with flexible elements such as virtual hinges | | 02/17/1976 | US3938762 Rotor blade force track sensing system and automatic span tracking system | | 02/03/1976 | US3936015 Retractable collective pitch stick | | 01/20/1976 | US3933324 Helicopter with opposite rotating torque cancelling horizontal propeller | | 01/13/1976 | US3932060 Bifilar vibration dampers | | 01/13/1976 | US3932059 Droop stops for helicopter rotor having elastomeric bearings | | 01/06/1976 | US3930625 Steam-powered aircraft |
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