| 313 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES |
| 364 | DF | CATHODE RAY TUBE {11} |
| 365 | DF | .~ Image pickup tube {6} |
| 384 | | .~.~ Photoconductive {5} |
| 385 | DF | .~.~.~> Layer composition {1} |
| 387 | DF | .~.~.~> Secondary electron emissive |
| 388 | DF | .~.~.~> Special ray sensitive |
| 389 | DF | .~.~.~> Focusing |
| 390 | DF | .~.~.~> Electrode or electrode support |