DIFF Subgroup
A24D 3/04 Tobacco smoke filters characterised by their shape or structure
Introduced: January 1980
Full Title
Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes > Tobacco smoke filters characterised by their shape or structure
Of 5 combined children, 0 exist in both systems.
5 codes are CPC-only extensions.
Child Classifications
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