Means structurally associated with the tube for indicating defects or previous use

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Industry

CPC
H01J19/76

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Parent Industries

HELECTRICITY H01Electric elements H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS H01J19/00Details of vacuum tubes of the types covered by group H01J21/00

Current Industry

H01J19/76Means structurally associated with the tube for indicating defects or previous use

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