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Helicopter blade and the like stand-off and folding device

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

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Helicopter blade folding with blade droop

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

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Helicopter blade positioning mechanism for foldable rotor...

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

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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 rotor blade

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

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Helicopter vibration control system and rotary force...

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

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High efficiency turbine with variable attack angle foils

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

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High pressure turbine disk hub with curved hub surface and...

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

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Hollow turbine blade stiffening

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

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