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

Mitsuyoshi Ishijima

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Axial blower

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

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Cross flow fan

Fluid reaction surfaces (i.e. – impellers) – Perimetric blading extending axially between annular members
Reexamination Certificate

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Portion of a fan for blowers

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Design Patent

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Profile ID: LFUS-PAI-P-2148234

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