| 313 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES |
| 364 | DF | CATHODE RAY TUBE {11} |
| 421 | DF | .~ Beam deflecting means {7} |
| 426 | DF | .~.~ Plural {2} |
| 427 | DF | .~.~.~ Three or more {3} |
| 429 | DF | .~.~.~.~ Field varied near screen (i.e., post deflection) {1} |
| 430 | | .~.~.~.~.~ By external element |