IPC Main Group
H01J 17/00 Gas-filled discharge tubes with solid cathodes
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Related Keywords
COLD -cathode tubesdischarge tubes using FLUORESCENCE
4 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H01J 17/02 Details
- H01J 17/38 Cold-cathode tubes
- H01J 17/5 Thermionic-cathode tubes
- H01J 17/64 Tubes specially designed for switching or modulating in a waveguide, e.g. TR box