DIFF Subgroup
A42B 3/28 Ventilating arrangements (A42B3/24 takes precedence)
Introduced: January 1990
Title
Titles differ between systems:
IPC: Ventilating arrangements
CPC: Ventilating arrangements (A42B3/24 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Helmets; Helmet covers > Parts, details or accessories of helmets > Ventilating arrangements
CPC:
Helmets; Helmet covers ( defence protection helmets F41H1/04) > Parts, details or accessories of helmets > Ventilating arrangements (A42B3/24 takes precedence)
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Child Classifications
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