CPC Subgroup
H01J 13/04 Main electrodes; Auxiliary anodes
Full Title
Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes > Details > Main electrodes; Auxiliary anodes
2 direct subcodes
Child Classifications
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- H01J 13/06 Cathodes
- H01J 13/16 Anodes; Auxiliary anodes for maintaining the discharge