DIFF Subgroup
H01J 13/20 Control electrodes, e.g. grid (for igniting arrangements H01J13/34)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Control electrodes, e.g. grid
CPC: Control electrodes, e.g. grid (for igniting arrangements H01J13/34)
Full Title
Full titles differ between systems:
IPC:
Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes > Details > Control electrodes, e.g. grid
CPC:
Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes > Details > Control electrodes, e.g. grid (for igniting arrangements H01J13/34)
No child classifications to compare. This is a leaf node in both IPC and CPC.