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Class Information
Number: 454/291
Name: Ventilation > Having inlet airway > Including specific air distributor (e.g., register, etc.) > Floor type > With means for liquid contact
Description: Subject matter comprising means for directly exposing the air to water or another liquid.

Patents under this class:

Patent Number Title Of Patent Date Issued
6878057 System for filtering and scenting of the air of individual rooms of a building Apr. 12, 2005
6814660 HVAC localized air filter assembly system Nov. 9, 2004
6749499 Cover for register and register opening Jun. 15, 2004
6234893 Vent device for use with medium for altering a condition of air entering an environment May. 22, 2001
5599485 Portable humidifier assembly Feb. 4, 1997
5403233 Humidifier Apr. 4, 1995
4706552 Furnace register humidifier Nov. 17, 1987
4338859 Humidifying aid Jul. 13, 1982
4327630 Humidifier May. 4, 1982
4240991 Humidifier Dec. 23, 1980
D255927 Room humidifier Jul. 15, 1980
4056049 Space humidifier Nov. 1, 1977
4006674 Humidifiers for forced air systems Feb. 8, 1977

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