US PATENT SUBCLASS 381 / 370
.~.~ Headphone

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.~.~ Headphone {3}
371  DF  .~.~.~> Particular cup {2}
374  DF  .~.~.~> Particular support structure {9}
384  DF  .~.~.~> Electrical hardware feature

DEFINITION

Classification: 381/370

Headphone:

(under subclass 182) Subject matter including a head-engaging element which holds a transducer for reproducing sound signal, against an ear of a user.

SEE OR SEARCH THIS CLASS, SUBCLASS:

74, for headphone circuits.