DIFF Subgroup
B21K 1/72 hooks, e.g. crane hooks, railway track spikes (making nails in general B21G)
Introduced: September 1968
Title
Titles differ between systems:
IPC: hooks, e.g. crane hooks, railway track spikes
CPC: hooks, e.g. crane hooks, railway track spikes (making nails in general B21G)
Full Title
Full titles differ between systems:
IPC:
Making machine elements > hooks, e.g. crane hooks, railway track spikes
CPC:
Making machine elements > hooks, e.g. crane hooks, railway track spikes (making nails in general B21G)
No child classifications to compare. This is a leaf node in both IPC and CPC.