Patent classifications
H
ELECTRICITY
Load children
H01
ELECTRIC ELEMENTS
Load children
H01J
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Load children
19/00
Details of vacuum tubes of the types covered by group H01J21/00
Load children Filter patents View analytics View as hierarchy
H01J19/02
Electron-emitting electrodes; Cathodes
Load children Filter patents View analytics View as hierarchy
H01J19/10
characterised by the shape
Load children Filter patents View analytics View as hierarchy
H01J19/12
Supports; Vibration-damping arrangements
Filter patents View analytics View as hierarchy