With Gas Or Vapor Patents (Class 313/567)
- Multiple gaseous discharge display panel (Class 313/582)
- Amplifier, cathanode, or ionic cathode (Class 313/588)
- Counter, indicator, or switching tube (Class 313/589)
- With shield to prevent discharge between electrodes (Class 313/590)
- Having cathode heater (Class 313/591)
- Start electrode exterior to envelope (Class 313/594)
- Internal start or control electrode between discharge electrodes (Class 313/595)
- Start electrode not in main discharge path (Class 313/601)
- Plural serial electrodes (Class 313/604)