4. Aeronautics and astronautics
  5. Aircraft, heavier-than-air
  6. Helicopter or auto-rotating wing sustained, i.e., gyroplanes

Thomas A. Zientek

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Cascade rotor blade for low noise

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Apertured or permeable
Reexamination Certificate

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System and method for improved rotor tip performance

Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Reexamination Certificate

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Unloaded lift offset rotor system for a helicopter

Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Reexamination Certificate

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Profile ID: LFUS-PAI-P-3043034

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