4. Fluid reaction surfaces (i.e., impellers)
  5. Specific blade structure
  6. Radial flow devices

Stephen J. Owen

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Airfoil for a helicopter rotor blade

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Reexamination Certificate

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Helicopter blade airfoil

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent

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Helicopter blade airfoil

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent

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Shroud geometry for unmanned aerial vehicles

Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and fluid sustained
Patent

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