US PATENT SUBCLASS 381 / 407
.~.~.~ Particular bobbin structure

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}
400  DF  .~.~ Movable voice coil {8}
407.~.~.~ Particular bobbin structure

DEFINITION

Classification: 381/407

Particular bobbin structure:

(under subclass 400) Subject matter specifying particular details about a cylindrical form or member on which the voice coil is wound.

SEE OR SEARCH CLASS

242, Winding, Tensioning, or Guiding

118+, for a winding bobbin or spool, generally.