IPC Subgroup
H01J 23/11 Means for reducing noise
Introduced: September 1968
Last revised: January 2006
Full Title
Details of transit-time tubes of the types covered by group > Electrodes; Magnetic control means; Screens > Means for reducing noise
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS