US PATENT SUBCLASS 381 / 421
.~.~.~.~ Plural magnets

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}
412  DF  .~.~ Magnetic circuit {8}
420  DF  .~.~.~ Having central magnetic portion {1}
421.~.~.~.~ Plural magnets {1}
422  DF  .~.~.~.~.~> Like poles adjacent

DEFINITION

Classification: 381/421

Plural magnets:

(under subclass 420) Subject matter having more than one permanent magnet or one permanent magnet and an electromagnet generated by a field coil.