IPC Subgroup
H01J 17/12 Control electrodes
Introduced: September 1968
Last revised: January 2006
Full Title
Gas-filled discharge tubes with solid cathodes > Details > Electrodes; Screens > Control electrodes
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS