| 313 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES |
| 567 | DF | WITH GAS OR VAPOR {24} |
| 581 | DF | .~ Three or more electrode discharge device {9} |
| 582 | ![]() | .~.~ Multiple gaseous discharge display panel {2} |
| 583 | DF | .~.~.~> Having electric terminal detail |
| 584 | DF | .~.~.~> Having intersecting electrode sets {2} |