IPC Subgroup
H01J 43/02 Tubes in which one or a few electrodes are secondary-electron-emitting electrodes
Introduced: September 1968
Last revised: January 2006
Full Title
Secondary-emission tubes; Electron-multiplier tubes > Tubes in which one or a few electrodes are secondary-electron-emitting electrodes
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS