4. Fluid reaction surfaces (i.e., impellers)
  5. Specific blade structure
  6. Irregular, flanged or channel forming blade surface

Rolf Hetico

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Methods and apparatus for reducing flow across compressor...

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Irregular – flanged or channel forming blade surface
Reexamination Certificate

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Methods and apparatus for structurally supporting airfoil tips

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Irregular – flanged or channel forming blade surface
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2781366

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