having one or more control electrodes

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Gas-filled discharge tubes with solid cathodes > Cold-cathode tubes > with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes or voltage-indicator tubes > having one or more control electrodes

CPC:

Gas-filled discharge tubes with solid cathode (H01J25/00, H01J27/00, H01J31/00 - H01J41/00 take precedence; gas filled spark gaps H01T; Marx converters H02M7/26) > Cold-cathode tubes > with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes, (cathode-glow lamps H01J61/04) > having one or more control electrodes

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H01J 17/46 for preventing and then permitting ignition but thereafter having no control IPC+CPC Available in IPC and CPC