US PATENT SUBCLASS 454 / 338
.~ With air pump

Current as of: June, 1999
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454 /   HD   VENTILATION

254  DF  HAVING INLET AIRWAY {11}
338.~ With air pump

DEFINITION

Classification: 454/338

With air pump:

(under subclass 254) Subject matter wherein the air admitting

means includes an air moving apparatus for forcing the air into the ventilated space.

SEE OR SEARCH CLASS

181, Acoustics, particularly

212+, for a fluid-conducting-type sound muffler of a general nature, and see the (1) Note to subclass 212; and subclass 224 for a sound absorbing ventilating duct or curb.

415, Rotary Kinetic Fluid Motors or Pumps, appropriate subclasses for a blower, per se.

416, Fluid Reaction Surfaces (i.e., Impellers), appropriate subclasses for a fan, per se.

417, Pumps, appropriate subclasses for a motor driven blower, per se.