US PATENT SUBCLASS 62 / 409
.~.~.~ For exterior port

Current as of: June, 1999
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62 /   HD   REFRIGERATION

404  DF  GAS CONTROLLER OR DIRECTOR {5}
407  DF  .~ Cooled gas directed relative to cooled enclosure {7}
408  DF  .~.~ With adjustable gas flow controller {1}
409.~.~.~ For exterior port

DEFINITION

Classification: 62/409

(under subclass 408) Apparatus controlling an opening to the exterior of the enclosure.

SEE OR SEARCH CLASS

454, Ventilation, particularly

322+, and 333+ for building ventilating of general application including an adjustable valve on an air inlet.