| 315 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
| 32 | DF | COMBINED LOAD DEVICE OR LOAD DEVICE TEMPERATURE MODIFYING MEANS AND ELECTRICAL CIRCUIT DEVICE STRUCTURE {19} |
| 51 | DF | .~ Plural circuit elements {1} |
| 52 | ![]() | .~.~ Plural impedance elements {2} |
| 53 | DF | .~.~.~> Diverse types of impedances |
| 54 | DF | .~.~.~> Plural inductive impedances |