IPC Subgroup
H01J 61/84 Lamps with discharge constricted by high pressure
Introduced: September 1968
Last revised: January 2006
Full Title
Gas-discharge or vapour-discharge lamps > Lamps with discharge constricted by high pressure
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
3 direct subcodes
Child Classifications
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- H01J 61/86 with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
- H01J 61/88 with discharge additionally constricted by envelope
- H01J 61/9 Lamps suitable only for intermittent operation, e.g. flash lamp