US PATENT SUBCLASS 454 / 339
HAVING OUTLET AIRWAY

Current as of: June, 1999
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454 /   HD   VENTILATION

339HAVING OUTLET AIRWAY {7}
340  DF  .~> Pressure regulation
341  DF  .~> With air pump {9}
357  DF  .~> Having emergency smoke handling feature
358  DF  .~> Having readliy movable air regulating louver, damper, or cover {3}
365  DF  .~> Along roof ridge
366  DF  .~> Slant roof ventilator
367  DF  .~> Having specific cover or shield for exterior vent opening {1}

DEFINITION

Classification: 454/339

HAVING OUTLET AIRWAY:

(under the class definition) Subject matter having means for exhausting air from a (ventilated) space.

(1) Note. The ventilated space often comprises but is not limited to a room in a building.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115+, for a railcar, bus, or trailer having an outlet airway.

162+, for other types of vehicles having an outlet airway.

SEE OR SEARCH CLASS

4, Baths, Closets, Sinks, and Spittoons,

209+, for outlet ventilators of that class.