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
H01J17/48
with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
Load children Filter patents View analytics View as hierarchy
H01J17/49
Display panels, e.g. with crossed electrodes; , e.g. making use of direct current
Load children Filter patents View analytics View as hierarchy