| 323 / | HD | ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS |
| 234 | DF | OUTPUT LEVEL RESPONSIVE {6} |
| 265 | DF | .~ Using a three or more terminal semiconductive device as the final control device {5} |
| 273 | DF | .~.~ Linearly acting {4} |
| 275 | DF | .~.~.~ With plural condition sensing {2} |
| 276 | DF | .~.~.~.~ For protective system {1} |
| 277 | ![]() | .~.~.~.~.~ With current sensor {1} |
| 278 | DF | .~.~.~.~.~.~> Having base-emitter of transistor coupled across sensor |