4. Environmental heating and cooling; fluid handling and sanitary e
  5. Heating or cooling
  6. Element or attachment, not elsewhere specified

Minel Kupferberg

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Back draft shutter

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

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Cleaning apparatus for exhaust system and method

Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Reexamination Certificate

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Cleaning apparatus for exhaust system and method

Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Reexamination Certificate

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Exhaust fan apparatus

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Scroll or helical type casing with specific exit nozzle
Patent

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Fan assembly and method

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Access opening through portion of casing or cover
Reexamination Certificate

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Profile ID: LFUS-PAI-P-910602

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