| 315 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
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| 1 | DF | CATHODE RAY TUBE CIRCUITS {11} |
| 3 | DF | .~ Combined cathode ray tube and circuit element structure {2} |
| 4 | DF | .~.~ Inductor or distributed parameter-type inductive structure {2} |
| 5 | DF | .~.~.~ Ray passes in or through a hollow distributed parameter device {15} |
| 5.18 | DF | .~.~.~.~ Ray returns to the hollow device; e.g., reflex type {1} |
| 5.19 | DF | .~.~.~.~.~ By same path and/or to same aperture {1} |
| 5.21 | DF | .~.~.~.~.~.~ Device tunable {1} |
| 5.22 |  | .~.~.~.~.~.~.~ Device has a flexible wall {1} |
| 5.23 | DF | .~.~.~.~.~.~.~>.~ Thermally controlled |