| 313 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES |
| 364 | DF | CATHODE RAY TUBE {11} |
| 477 R | | .~ Envelope {6} |
| 478 | DF | .~.~> With external optical element |
| 479 | DF | .~.~> Coating or shielding |
| 480 | DF | .~.~> Composition |
| 481 | DF | .~.~> With getter or gas |
| 482 | DF | .~.~> Support for electrode or envelope |
| 477 HC | DF | .~.~> With details of high-voltage connector |