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

Tadashi Ohnishi

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Axial fan

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Hollow
Patent

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Fan guard of blower unit and air conditioner

Fluid reaction surfaces (i.e. – impellers) – Protective screen or guard – Water or marine propellers
Reexamination Certificate

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Impeller for blower and air conditioner having the same

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

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Profile ID: LFUS-PAI-P-1897902

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