US PATENT SUBCLASS 84 / 673
.~.~.~.~ With Variable filtering

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
671  DF  .~.~ Electric analog oscillators {9}
672  DF  .~.~.~ Variable frequency {2}
673.~.~.~.~ With Variable filtering

DEFINITION

Classification: 84/673

With variable filtering:

(under subclass 672) Subject matter wherein the output of the oscillator is applied to a filter wherein partials or harmonics to be removed can be varied.