IPC Main Group
H01J 13/00 Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Related Keywords
discharge tubes using VAPOUR(S)
3 direct subcodes
Child Classifications
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- H01J 13/02 Details
- H01J 13/5 Tubes having a single main anode
- H01J 13/56 Tubes having two or more main anodes