US PATENT SUBCLASS 454 / 324
.~.~.~ Sliding

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}
322  DF  .~.~ With adjustable valve {4}
324.~.~.~ Sliding

DEFINITION

Classification: 454/324

Sliding:

(under subclass 322) Subject matter wherein a portion of the positively repositionable airflow regulating means translates along another portion of the means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

274, for an independent vent sleeve in a ceiling, wall, or floor which contains a sliding valve.