US PATENT SUBCLASS 381 / 189
.~ Having protective or sheilding feature

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}
189.~ Having protective or sheilding feature

DEFINITION

Classification: 381/189

Having protective or shielding feature:

(under subclass 150) Subject matter having structure for shielding a transducer from adverse environmental conditions or preventing undesired effects caused by an external magnetic field.

(1) Note. Adverse conditions include moisture and impact.