US PATENT SUBCLASS 454 / 349
.~.~.~ Ceiling mounted air pump

Current as of: June, 1999
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454 /   HD   VENTILATION

339  DF  HAVING OUTLET AIRWAY {7}
341  DF  .~ With air pump {9}
347  DF  .~.~ Having readily movable air regulating louver,damper, or cover {5}
349.~.~.~ Ceiling mounted air pump

DEFINITION

Classification: 454/349

Ceiling mounted air pump:

(under subclass 347) Subject matter wherein the air exhausting means is supported by and withdraws air through an interior, top structural barrier of the ventilated space.