IPC Subgroup
H01J 29/9 Leading-in arrangements; Seals therefor
Introduced: September 1968
Last revised: January 2006
Full Title
Details of cathode-ray tubes or of electron-beam tubes of the types covered by group > Leading-in arrangements; Seals therefor
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS