US PATENT SUBCLASS 181 / 263
.~.~.~.~ Motion induced

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}
259  DF  .~.~ With disparate fluid mingling {2}
262  DF  .~.~.~ Induced by suction {1}
263.~.~.~.~ Motion induced

DEFINITION

Classification: 181/263

Motion induced:

(under subclass 262) Subject matter wherein the motion of the device on which the muffler is installed creates a vacuum by scooping a fluid as the device moves.