US PATENT SUBCLASS 110 / 162
.~ Fan exhaust
Current as of: June, 1999
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DEFINITION
Classification: 110/162
(under subclass 147) Devices in which the products of combustion or a part of them are drawn through a fan to increase the draft.
SEE OR SEARCH THIS CLASS, SUBCLASS:
159, for portable fans designed to be applied to a smokestack to assist the draft of the fire and capable of being readily detached.
SEE OR SEARCH CLASS
55, Gas Separation,
400+, for separators mounted for continuous motion.
454, Ventilation, air pump subclasses.
