US PATENT SUBCLASS 181 / 228
.~.~ With exhaust pipe

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}
228.~.~ With exhaust pipe

DEFINITION

Classification: 181/228

With exhaust pipe:

(under subclass 212) Subject matter comprising an attenuating fluid conducting device in combination with an additional pipe (i.e., exhaust pipe) connected to the exhaust outlet of the attenuating device.