US PATENT SUBCLASS 181 / 159
.~ With horn

Current as of: June, 1999
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181 /   HD   ACOUSTICS

157  DF  DIAPHRAGM {10}
159.~ With horn

DEFINITION

Classification: 181/159

(under subclass 157) Subject matter including a sound intensifying horn acoustically coupled to the diaphragm.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177+, for sound intensifying horns, per se.