US PATENT SUBCLASS 381 / 396
.~ Electromagnetic (e.g., dyynamic)

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.~ Electromagnetic (e.g., dyynamic) {8}
397  DF  .~.~> Cooling feature
398  DF  .~.~> Having diaphragm support feature
399  DF  .~.~> Conductive diaphragm (e.g., ribbon)
400  DF  .~.~> Movable voice coil {8}
411  DF  .~.~> Including adjustment mechanism
412  DF  .~.~> Magnetic circuit {8}
423  DF  .~.~> Specified diaphragm shape or structure {6}
433  DF  .~.~> Basket detail

DEFINITION

Classification: 381/396

Electromagnetic (e.g., dynamic):

(under subclass 150) Subject matter wherein an information varied electrical signal produces a similarly varying magnetic field which causes motion in a sound radiating device to produce a corresponding acoustical wave.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117, for circuitry combined with a magnetic loudspeaker.

SEE OR SEARCH CLASS

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, for electromagnetic circuits and devices, generally.

336, Inductor Devices, for inductor devices, generally.