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DIFF Subgroup
H01J 40/10

Selection of substances for gas fillings

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Photoelectric discharge tubes not involving the ionisation of a gas > Details > Selection of substances for gas fillings

CPC:

Photoelectric discharge tubes not involving the ionisation of a gas (H01J49/00 takes precedence) > Details > Selection of substances for gas fillings

No child classifications to compare. This is a leaf node in both IPC and CPC.