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
H01J19/78
One or more circuit elements structurally associated with the tube
Load children Filter patents View analytics View as hierarchy