IPC Subgroup
H01J 17/49 Display panels, e.g. with crossed electrodes
Introduced: January 1980
Last revised: January 2012
Full Title
Gas-filled discharge tubes with solid cathodes > Cold-cathode tubes > with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron > Display panels, e.g. with crossed electrodes
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS