| 313 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES |
| 364 | DF | CATHODE RAY TUBE {11} |
| 421 | DF | .~ Beam deflecting means {7} |
| 426 | DF | .~.~ Plural {2} |
| 432 | ![]() | .~.~.~ Electrostatic {5} |
| 433 | DF | .~.~.~.~> Magnetic |
| 434 | DF | .~.~.~.~> Nonparallel or asymmetric {1} |
| 436 | DF | .~.~.~.~> Enclosed or overlapping |
| 437 | DF | .~.~.~.~> With distortion correction |
| 438 | DF | .~.~.~.~> With support |