US PATENT SUBCLASS 454 / 283
.~.~.~.~ With screen mounting means

Current as of: June, 1999
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454 /   HD   VENTILATION

254  DF  HAVING INLET AIRWAY {11}
275  DF  .~ Including specific cover or shield for exterior vent opening {1}
276  DF  .~.~ Wall type {1}
277  DF  .~.~.~ Louver {5}
283.~.~.~.~ With screen mounting means

DEFINITION

Classification: 454/283

With screen mounting means:

(under subclass 277) Subject matter comprising means to hold in position a mesh-like element through which the air flows.