4. Ventilation
  5. Fire damper

Ruskin Company

Corporate Assignee

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Corporate Assignee

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Air handling system

Ventilation – Having inlet airway – Including specific cover or shield for exterior vent opening
Reexamination Certificate

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Fan air flow measurement system

Rotary kinetic fluid motors or pumps – With inspection – signaling – indicating or measuring means
Reexamination Certificate

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Fire/smoke damper control system

Ventilation – Fire damper
Reexamination Certificate

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Gas measurement system

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate

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