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PCE
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DIFF Subgroup
H01J 13/58

with control by one or more intermediate control electrodes

Introduced: September 1968

Full Title

Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes > Tubes having two or more main anodes > with control by one or more intermediate control electrodes

No child classifications to compare. This is a leaf node in both IPC and CPC.