US PATENT SUBCLASS 454 / 351
.~.~.~.~ Plural damper panel

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}
350  DF  .~.~.~ Wall mounted air pump {1}
351.~.~.~.~ Plural damper panel

DEFINITION

Classification: 454/351

Plural damper panels:

(under subclass 350) Subject matter comprising an easily shiftable air permitting or preventing inner body having two or more air engaging and controlling plates.

SEE OR SEARCH THIS CLASS, SUBCLASS:

6, for plural pivoted chimney or stacktop closures.

31, for plural pivoted air current regulating means in a chimney or stacktop structure.

352, for plural damper panels in an outlet airway.