US PATENT SUBCLASS 327 / 469
.~.~.~.~ Triac

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

365  DF  GATING (I.E., SWITCHING INPUT TO OUTPUT) {12}
419  DF  .~ Utilizing three or more electrode solid-state device {7}
438  DF  .~.~ Four or more layer device (e.g., thyristor, etc.) {6}
465  DF  .~.~.~ DC supply {6}
469.~.~.~.~ Triac

DEFINITION

Classification: 327/469

Triac:

(under subclass 465) Subject matter including a bidirectional rectifier (essentially two SCRs in parallel) that functions as an electronically controlled switch and having an npnpn structure that can be triggered into either forward or reverse conduction by a pulse applied to its gate electrode.