| 315 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
| 1 | DF | CATHODE RAY TUBE CIRCUITS {11} |
| 364 | DF | .~ Cathode-ray deflections circuits {16} |
| 372 | ![]() | .~.~ For cathode-ray tube having plural targets {2} |
| 373 | DF | .~.~.~> Targets radially about cathode |
| 374 | DF | .~.~.~> Targets in single plane |