4. Fluid reaction surfaces (i.e., impellers)
  5. Specific blade structure
  6. Laminated, embedded member or encased material

William F. Immell

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Axial flow fan and fan blade

Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Blade held between separable surfaces
Reexamination Certificate

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Plastic fan blade for industrial cooling towers and method of ma

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Laminated – embedded member or encased material
Patent

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Profile ID: LFUS-PAI-P-1486634

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