US PATENT SUBCLASS 84 / 648
.~.~.~ With frequency multiplication or division

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
647  DF  .~.~ Digital combinational circuit {7}
648.~.~.~ With frequency multiplication or division

DEFINITION

Classification: 84/648

With frequency multiplication or division:

(under subclass 647) Subject matter wherein the discrete notes of a complete musical scale are obtained by varying the oscillator output frequency.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

113+, for miscellaneous frequency multiplication or division.

331, Oscillators, appropriate subclasses for oscillators used to provide a digital signal.

363, Electric Power Conversion Systems,

157, for converting frequencies.

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems, 118+, for pulse frequency dividing chains; subclass 47 for pulse multiplication or division.