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Class Information
Number: 454/331
Name: Ventilation > Having inlet airway > Including specific air distributor (e.g., register, etc.) > Having register box, frame, or grating > Including specific grating or grating mounting structure
Description: Subject matter wherein particular significance is attributed to (1) a grill-like exit structure or (2) a means for attaching a grill-like exit structure directly to a support.

Sub-classes under this class:

Class Number Class Name Patents
454/332 Readily moveable grating 15

Patents under this class:

Patent Number Title Of Patent Date Issued
8425285 Duct installation structure Apr. 23, 2013
8419515 Magnetic register vent cover and associated method Apr. 16, 2013
7950988 Variable volume floor diffuser with attachment means May. 31, 2011
7566263 Register grille and connector frame with releasable connection Jul. 28, 2009
7140960 Boot hanger mounting bracket Nov. 28, 2006
7108600 Air duct register Sep. 19, 2006
6652375 Air-conditioning register and boot assembly Nov. 25, 2003
6601356 Connector frame for ventilation opening Aug. 5, 2003
6302784 Modular air vent assembly kit Oct. 16, 2001
6227962 Vent coupler May. 8, 2001
6192640 Double divisible connector frame for mounting air grilles and louvers to heating and cooling duct outlets Feb. 27, 2001
6012260 Air vent insert Jan. 11, 2000
6007422 Universal damper mounting system and method Dec. 28, 1999
5800259 Grill assembly Sep. 1, 1998
5771647 Grille assembly and related method Jun. 30, 1998
5671610 Fan guard of a freezing chamber in a refrigerator Sep. 30, 1997
5338256 Ventilator Aug. 16, 1994
5176570 Filtered cold air baseboard return Jan. 5, 1993
5121675 Device for supplying air to and if need be evacuating air from a room Jun. 16, 1992
4573328 Apparatus for mounting a packaged terminal air controller to a plastic well sleeve Mar. 4, 1986
4383666 Safety construction for aircraft May. 17, 1983
4325229 Interior air conditioner cover Apr. 20, 1982
4208010 Ventilator assembly Jun. 17, 1980
4050366 Grating Sep. 27, 1977
3948155 Air diffusers Apr. 6, 1976

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