| 257 / | HD | ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES) |
| 499 | DF | INTEGRATED CIRCUIT STRUCTURE WITH ELECTRICALLY ISOLATED COMPONENTS {9} |
| 557 | DF | .~ Lateral bipolar transistor structure {3} |
| 560 | DF | .~.~ With multiple collectors or emitters {2} |
| 561 | | .~.~.~ With different emitter to collector spacings or facing areas |