US PATENT SUBCLASS 181 / 238
.~.~ Multiple distinct inlets and/or outlets

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}
238.~.~ Multiple distinct inlets and/or outlets {1}
239  DF  .~.~.~> Outlets

DEFINITION

Classification: 181/238

Multiple distinct inlets and/or outlets:

(under subclass 212) Subject matter wherein the moving fluid is introduced in the muffler via at least two inlets or expelled through at least two outlets.