| 315 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
|
| 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 |  | .~.~.~.~.~.~ Device tunable {1} |
| 5.22 | DF | .~.~.~.~.~.~.~> Device has a flexible wall {1} |