US PATENT SUBCLASS 181 / 197
.~.~ Adjustable

Current as of: June, 1999
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181 /   HD   ACOUSTICS

175  DF  SOUND-MODIFYING MEANS {12}
196  DF  .~ Within tubular means {1}
197.~.~ Adjustable

DEFINITION

Classification: 181/197

(under subclass 196) Subject matter wherein the sound modifying structure can be altered or moved within the tubular member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

186, for similar structure within a sound intensifying horn.