| 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} |
| 427 | DF | .~.~ Field-effect transistor {5} |
| 434 | DF | .~.~.~ Insulated gate FET (e.g., MOSFET, etc.) {3} |
| 435 | | .~.~.~.~ GaAs |