DIFF Subgroup
F16B 15/0023 Full Title
Nails; Staples (surgical staples A61B17/064; manufacture of nails or staples B21G ; railway spikes E01B9/06)
Of 6 combined children, 0 exist in both systems.
6 codes are CPC-only extensions.
Note: 4 CPC extensions are marked as secondary classification only.