IPC Subgroup
H01J 40/02 Details
Introduced: January 1980
Last revised: January 2006
Full Title
Photoelectric discharge tubes not involving the ionisation of a gas > Details
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
5 direct subcodes
Child Classifications
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- H01J 40/04 Electrodes
- H01J 40/08 Magnetic means for controlling discharge
- H01J 40/1 Selection of substances for gas fillings
- H01J 40/12 One or more circuit elements structurally associated with the tube
- H01J 40/14 Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for