US PATENT SUBCLASS 181 / 264
.~.~ With baffle or baffle structure

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.~.~ With baffle or baffle structure {9}
265  DF  .~.~.~> Retroverted {1}
267  DF  .~.~.~> Coaxial foraminous walls
268  DF  .~.~.~> Multi-passage
269  DF  .~.~.~> Expansion chamber type {6}
276  DF  .~.~.~> Side branch
277  DF  .~.~.~> Movable baffle {1}
279  DF  .~.~.~> Spiral {1}
281  DF  .~.~.~> Perpendicular and/or oblique
282  DF  .~.~.~> Casings {1}

DEFINITION

Classification: 181/264

With baffle or baffle structure:

(under subclass 212) Subject matter in which barriers or partitions cause the fluids to travel in a tortuous path.