IPC Subgroup
H01J 1/4 forming part of the envelope of the tube or lamp
Introduced: September 1968
Last revised: January 2006
Full Title
Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps > Main electrodes > Solid anodes; Solid auxiliary anodes for maintaining a discharge > forming part of the envelope of the tube or lamp
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS