DIFF Subgroup
F41H 5/04 composed of more than one layer
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Armour; Armour plates; Shields > Plate construction > composed of more than one layer
CPC:
Armour; Armour plates (processes for manufacturing or treating B21, C21, ) > Plate construction > composed of more than one layer
Of 5 combined children, 0 exist in both systems.
5 codes are CPC-only extensions.
Child Classifications
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