US PATENT SUBCLASS 381 / 376
.~.~.~.~ Headgear

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}
182  DF  .~ Plural or compound reproducers {4}
370  DF  .~.~ Headphone {3}
374  DF  .~.~.~ Particular support structure {9}
376.~.~.~.~ Headgear

DEFINITION

Classification: 381/376

Headgear:

(under subclass 374) Subject matter in which the support structure is a helmet, hat, breathing mask, or similar structure.