US PATENT SUBCLASS 181 / 281
.~.~.~ Perpendicular and/or oblique

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}
281.~.~.~ Perpendicular and/or oblique

DEFINITION

Classification: 181/281

Perpendicular and/or oblique:

(under subclass 264) Subject matter having baffles angularly disposed relative to the axis of the flow passage, i.e., not parallel to the axis.