US PATENT SUBCLASS 181 / 278
.~.~.~.~ Biased

Current as of: June, 1999
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181 /   HD   ACOUSTICS

175  DF  SOUND-MODIFYING MEANS {12}
212  DF  .~ Muffler, fluid conducting type {25}
264  DF  .~.~ With baffle or baffle structure {9}
277  DF  .~.~.~ Movable baffle {1}
278.~.~.~.~ Biased

DEFINITION

Classification: 181/278

Biased:

(under subclass 277) Subject matter having means tending to force the moving baffle toward a position to restrict flow of fluid.