4. Gas separation
  5. With means securing or retaining separating media
  6. Hinged or pivoted retainer or clamp on backing frame or in...

Richard W. Stephens

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Method for ventilating secure facility and system and...

Ventilation – Having inlet airway – Sleeved vent for ceiling – wall – or floor
Reexamination Certificate

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Security vent

Ventilation – Exterior vault or manhole cover
Reissue Patent

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Security vent

Gas separation – With means securing or retaining separating media – Hinged or pivoted retainer or clamp on backing frame or in...
Patent

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Security vent

Ventilation – Exterior vault or manhole cover
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

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Profile ID: LFUS-PAI-P-1816371

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