US PATENT SUBCLASS 454 / 312
.~.~.~.~ Having adjustable vane

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}
309  DF  .~.~ Louvered air distributor {3}
310  DF  .~.~.~ Concentric {2}
312.~.~.~.~ Having adjustable vane

DEFINITION

Classification: 454/312

Having adjustable vane:

(under subclass 310) Subject matter wherein at least one of the slats or slat-like portions is positively

repositionable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

311, for a separate, adjustable internal damper in addition to the vanes.