DIFF Subgroup
B21G 7/04 of hairpins
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Making pins of U-like shape or split-pins > of U-like shape > of hairpins
CPC:
Making pins of U-like shape or split-pins (of paper fasteners or staples B21D53/46, B21F45/16) > of U-like shape > of hairpins
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
Navigate with arrow keys, Enter to open