IPC Subgroup
B21K 1/72 hooks, e.g. crane hooks, railway track spikes
Introduced: September 1968
Last revised: January 2006
Full Title
Making machine elements > hooks, e.g. crane hooks, railway track spikes
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS