US PATENT SUBCLASS 181 / 273
.~.~.~.~ And side branch chamber

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}
269  DF  .~.~.~ Expansion chamber type {6}
273.~.~.~.~ And side branch chamber

DEFINITION

Classification: 181/273

And side branch chamber:

(under subclass 269) Subject matter having cushion, acoustic filter, or resonator chambers in communication with the fluid passages.

SEE OR SEARCH THIS CLASS, SUBCLASS:

250, 266 and 276, for similar devices with side branch chambers.