IPC Subgroup
H01J 21/34 Tubes with electrode system arranged or dimensioned so as to eliminate transit-time effect
Introduced: September 1968
Last revised: January 2006
Full Title
Vacuum tubes > Tubes with electrode system arranged or dimensioned so as to eliminate transit-time effect
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS