4. Ventilation
  5. Having forced recirculation
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Self-contained activity module

Ventilation – Having forced recirculation
Reexamination Certificate

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Shroud for axial flow fan

Ventilation – Having forced recirculation
Reexamination Certificate

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Smoke detection and ventilation system

Ventilation – Having forced recirculation
Patent

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Smoke extraction system

Ventilation – Having forced recirculation – Including automatic control means
Reexamination Certificate

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Solar powered fan for portable enclosure

Ventilation – Having forced recirculation – Forced recirculation alone
Reexamination Certificate

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Space-conditioning control employing image-based detection...

Ventilation – Having forced recirculation – Including automatic control means
Reexamination Certificate

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Staged power exhaust for HVAC air handling units

Ventilation – Having forced recirculation – Including automatic control means
Patent

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Suspension type oscillation mechanism

Ventilation – Having forced recirculation – Forced recirculation alone
Reexamination Certificate

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System and method for protection against nuclear, biological...

Ventilation – Having forced recirculation – Forced recirculation alone
Reexamination Certificate

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