US PATENT SUBCLASS 381 / 160
.~.~ Reflecting element

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

150  DF  ELECTRO-ACOUSTIC AUDIO TRANSDUCER {18}
337  DF  .~ Having acoustic wave modifying structure {5}
160.~.~ Reflecting element

DEFINITION

Classification: 381/160

Reflecting element:

(under subclass 153) Subject matter having an element which reflects the sound waves.