IPC Main Group
H01J 40/00 Photoelectric discharge tubes not involving the ionisation of a gas
Introduced: January 1980
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Related Keywords
discharge tubes sensitive to RADIATION
2 direct subcodes
Child Classifications
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- H01J 40/02 Details
- H01J 40/16 having photo-emissive cathode, e.g. alkaline photoelectric cell