US PATENT SUBCLASS 126 / 312
.~ Ventilation
Current as of: June, 1999
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DEFINITION
Classification: 126/312
(under subclass 307) Subject matter having devices designed to carry off vitiated air and odors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
293, for damper devices where the smoke controlling damper and the ventilating damper are interconnected.
301, for stove hoods with means connecting them with stove pipes or flues.
SEE OR SEARCH CLASS
454, Ventilation, 43, for ventilating devices for buildings in which an outlet current of air is heated to increase its velocity.
