DIFF Subgroup
B21G 1/06 of needles with hook or barb, e.g. crochet hooks
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Making needles used for performing operations > of needles with hook or barb, e.g. crochet hooks
CPC:
Making needles used for performing operations (forming heads on pin-like needles B21G3/12; making U-shaped hairpins B21G7/04) > of needles with hook or barb, e.g. crochet hooks
No child classifications to compare. This is a leaf node in both IPC and CPC.