IPC Main Group
H01J 31/00 Cathode-ray tubes; Electron-beam tubes
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Related Keywords
CATHODE(S) -ray tubesdischarge tubes using DARK trace or tenebrescent materialsdischarge tubes using TENEBRESCENT
2 direct subcodes
Child Classifications
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- H01J 31/02 having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
- H01J 31/08 having a screen on or from which an image or pattern is formed, picked-up, converted, or stored