US PATENT SUBCLASS 381 / 398
.~.~ Having diaphragm support 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}
396  DF  .~ Electromagnetic (e.g., dyynamic) {8}
398.~.~ Having diaphragm support feature

DEFINITION

Classification: 381/398

Having diaphragm support feature:

(under subclass 396) Subject matter having specific structure to maintain a sound radiating flexible membrane in a specified position relative to other parts of the transducer.