US PATENT SUBCLASS 181 / 265
.~.~.~ Retroverted

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}
265.~.~.~ Retroverted {1}
266  DF  .~.~.~.~> And side branch chamber

DEFINITION

Classification: 181/265

Retroverted:

(under subclass 264) Subject matter having a plurality of serially connected fluid passages substantially parallel to the inlet, the direction of flow of the fluid being reversed as it travels through each successive passage.