| 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} |
| 447 | DF | .~.~.~ AC supply {6} |
| 453 | DF | .~.~.~.~ Silicon controlled rectifier (SCR) {4} |
| 455 | DF | .~.~.~.~.~ Triac {4} |
| 456 | | .~.~.~.~.~.~ Plural |