US PATENT SUBCLASS 84 / 674
.~.~.~.~ With space discharging means

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}
674.~.~.~.~ With space discharging means

DEFINITION

Classification: 84/674

With space discharging means:

(under subclass 672) Subject matter wherein the oscillator includes one or more devices in which conduction of electrons takes place through a vacuum or gaseous medium.