IPC Subgroup
H01J 1/35 Electrodes exhibiting both secondary emission and photo-emission
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 > Electrodes exhibiting both secondary emission and photo-emission
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS