| 313 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES |
| 513 | DF | WITH CHARACTER DISPLAY (E.G., DIGITS OR LETTERS) {2} |
| 514 | | .~ Gaseous discharge medium {4} |
| 515 | DF | .~.~> With character-shaped envelope |
| 516 | DF | .~.~> Electrode with character-shaped aperture |
| 517 | DF | .~.~> With electrode display segments {2} |
| 520 | DF | .~.~> With integrant display electrode {1} |