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Class 454/81 - Porthole ventilator


Subclass of Class 454 - Ventilation
Definition: Subject matter wherein the ventilating means is, or is used
No. of patents: 2
Last issue date: 08/21/2007


NumberTitleIssue Date
7257927Three-piece frame assembly for window of enclosure
Frames are disclosed for mounting windows within the walls of enclosures for isolating or sealing substances such as radioactive or other hazardous substances from the surrounding environment. In a first embodiment of the present invention, a window assembly include...
08/21/2007
6289834Rain and sun shielding collapsible ventilator
A portable collapsible ventilator that is used to direct air currents into a boat hatch, recreational vehicle vent, or other opening in an enclosed space while, at the same time shielding that opening from the intrusion of rain and direct sunlight. The ve...
09/18/2001
 
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