IPC Subgroup
H01J 17/04 Electrodes; Screens
Introduced: September 1968
Last revised: January 2012
Full Title
Gas-filled discharge tubes with solid cathodes > Details > Electrodes; Screens
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
3 direct subcodes
Child Classifications
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- H01J 17/06 Cathodes
- H01J 17/1 Anodes
- H01J 17/12 Control electrodes