DIFF Subgroup
H01J 13/56 Tubes having two or more main anodes
Introduced: September 1968
Full Title
Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes > Tubes having two or more main anodes
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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- H01J 13/58 with control by one or more intermediate control electrodes IPC+CPC Available in IPC and CPC