Patent classifications
H
ELECTRICITY
Load children
H01
ELECTRIC ELEMENTS
Load children
H01J
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Load children
17/00
Gas-filled discharge tubes with solid cathode
Load children Filter patents View analytics View as hierarchy
H01J17/40
with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes,
Load children Filter patents View analytics View as hierarchy
H01J17/44
having one or more control electrodes
Load children Filter patents View analytics View as hierarchy