US PATENT SUBCLASS 181 / 241
.~.~ Adjustable muffler (i.e., internal or external parts)

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}
241.~.~ Adjustable muffler (i.e., internal or external parts)

DEFINITION

Classification: 181/241

Adjustable muffler (i.e., internal or external parts):

(under subclass 212) Subject matter wherein two or more of the internal parts of external casing sections can be repositioned relative to each other to change the size of the muffler.