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Class Information
Number: 454/241
Name: Ventilation > Having both inlet and outlet airways > Including unitary inlet and outlet housing
Description: Subject matter comprising a single structure containing portions of the air admitting and air exhausting means.

Sub-classes under this class:

Class Number Class Name Patents
454/245 Air distributor with return vent (e.g., register, etc.) 23
454/242 Rooftop 12
454/243 Sleeved vent for ceiling, wall, or floor (e.g., thimble) 9
454/249 With air pump 17

Patents under this class:

Patent Number Title Of Patent Date Issued
8574047 Air-exchange device for buildings Nov. 5, 2013
8303751 Method for integral vent screen in molded panels Nov. 6, 2012
8221523 Apparatus for the uninterruptible filtering of gas Jul. 17, 2012
7895771 Clothes dryer with thermal insulation pad Mar. 1, 2011
7635296 Air handling systems or devices intermingling fresh and stale air Dec. 22, 2009
7572179 Ventilation system Aug. 11, 2009
7563160 Ventilating apparatus Jul. 21, 2009
6718973 Evaporation chamber for a respiratory gas humidifier Apr. 13, 2004
6637168 Aircraft engine run-up hangar Oct. 28, 2003
6629886 Demand ventilation module Oct. 7, 2003
6514138 Demand ventilation module Feb. 4, 2003
5947816 Modular soffit vent Sep. 7, 1999
5762550 Heat transfer system for electronic enclosures Jun. 9, 1998
5722483 Air exchange apparatus and method Mar. 3, 1998
5435377 Ventilator with air-to-air heat exchanger and pressure responsive damper Jul. 25, 1995
5343328 Structure of automobile rear-view mirror Aug. 30, 1994
4870832 Positive ventilation cooling augmentor Oct. 3, 1989
4846261 Vacuum heat exchange apparatus for ventilation of buildings, in particularly of animal sheds Jul. 11, 1989
4672888 Inflatable greenhouse vent cover Jun. 16, 1987
4625628 Combined wall and ventilator module for a building Dec. 2, 1986

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