US PATENT SUBCLASS 454 / 306
.~.~ Having air duct extending into room

Current as of: June, 1999
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454 /   HD   VENTILATION

254  DF  HAVING INLET AIRWAY {11}
284  DF  .~ Including specific air distributor (e.g., register, etc.) {14}
306.~.~ Having air duct extending into room

DEFINITION

Classification: 454/306

Having air duct extending into room:

(under subclass 284) Subject matter wherein the air directing means includes an elongated tubular air passageway projecting through a barrier and into the ventilated space.

(1) Note. The extended air duct may subsequently pass out of the room.

(2) Note. This subclass includes many inlet ventilation means combined with furniture.