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IPC Subgroup
H01J 17/26

Means for producing, introducing, or replenishing gas or vapour during operation of the tube

Introduced: September 1968

Last revised: January 2012

Full Title

Gas-filled discharge tubes with solid cathodes > Details > Means for obtaining or maintaining the desired pressure within the tube > Means for producing, introducing, or replenishing gas or vapour during operation of the tube

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS