IPC Subgroup
H01J 19/54 Vessels; Containers; Shields associated therewith
Introduced: September 1968
Last revised: January 2006
Full Title
Details of vacuum tubes of the types covered by group > Vessels; Containers; Shields associated therewith
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Related Keywords
VESSEL(S) for discharge tubes
2 direct subcodes
Child Classifications
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- H01J 19/56 characterised by the material of the vessel or container
- H01J 19/57 provided with coatings on the walls thereof; Selection of materials for the coatings