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Helicopter engine-drive assembly

Fluid reaction surfaces (i.e. – impellers) – Specific drive or transmission means – Hand mixers
Patent

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Helicopter flap lock assembly

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Including movement limit stop or damping means
Patent

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Helicopter gimbal rotor

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent

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Helicopter gimbal rotor

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent

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Helicopter gimbal rotor

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent

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Helicopter hub system

Fluid reaction surfaces (i.e. – impellers) – Drive by fluid reaction jet on working member – Articulated or flexible connection
Patent

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Helicopter in-flight rotor tracking system, method, and...

Fluid reaction surfaces (i.e. – impellers) – Method of operation
Reexamination Certificate

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Helicopter individual blade control system

Fluid reaction surfaces (i.e. – impellers) – Method of operation
Patent

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Helicopter individual blade control system

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Responsive to fixed actuator
Reexamination Certificate

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Helicopter main rotor blade balance weight retention assembly

Fluid reaction surfaces (i.e. – impellers) – With weight-balancing means
Reexamination Certificate

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Helicopter main rotor blade having a short span slot near the ti

Fluid reaction surfaces (i.e. – impellers) – With fluid passage in working member communicating with... – Air and watercraft propellers
Patent

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Helicopter power plant control

Fluid reaction surfaces (i.e. – impellers) – Interrelated controls for impeller and drive means – Pitch adjustment and throttle regulation with condition...
Patent

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Helicopter power train for distributing rotor blade flapping dis

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Resilient bias or mount
Patent

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Helicopter power transmitting apparatus

Fluid reaction surfaces (i.e. – impellers) – Specific drive or transmission means – Hand mixers
Reexamination Certificate

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Helicopter primary flight controls

Fluid reaction surfaces (i.e. – impellers) – Plural impellers having relative movement or independent... – Differential or independent adjustment
Patent

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Helicopter provided with a plurality of lift elements each...

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Lead-lag type rotor blade movement
Reexamination Certificate

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Helicopter rotor

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Including movement limit stop or damping means
Patent

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Helicopter rotor

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent

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Helicopter rotor

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent

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Helicopter rotor

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller...
Reexamination Certificate

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