US PATENT SUBCLASS 84 / 680
.~.~.~.~ 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}
678  DF  .~.~.~ Selecting circuits {9}
680.~.~.~.~ With space discharging means

DEFINITION

Classification: 84/680

With space discharging means:

(under subclass 678) Subject matter wherein the selecting circuit includes a device in which conduction of electrons takes place through a vacuum or gaseous medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

674, for space discharging means with variable frequency.

SEE OR SEARCH CLASS

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

113+, for frequency conversion or control.