| 315 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
| 1 | DF | CATHODE RAY TUBE CIRCUITS {11} |
| 364 | DF | .~ Cathode-ray deflections circuits {16} |
| 395 | DF | .~.~ Plural potentials or currents applied to deflection member {2} |
| 398 | ![]() | .~.~.~ With cathode-ray centering |