US PATENT SUBCLASS 181 / 227
.~.~ Pipe-muffler (e.g., tail pipe type)

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}
227.~.~ Pipe-muffler (e.g., tail pipe type)

DEFINITION

Classification: 181/227

Pipe-muffler (e.g., tail pipe type):

(under subclass 212) Subject matter wherein the fluid conducting device is comprised of a conduit with sound attenuating chambers along the length thereof.

(1) Note. Subject matter of this subclass type is generally referred to as a tail pipe, and is usually connected to a muffler which is not claimed as part of the system.