IPC Subgroup
B21L 11/04 the ends being pierced or punched to form eyes
Introduced: September 1968
Last revised: January 2006
Full Title
Making chains or chain links of special shape > each link being formed of a single member of which both ends are bent or shaped to engage the middle portion of the next link > the ends being pierced or punched to form eyes
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- MAKING METAL CHAINS
1 direct subcode
Child Classifications
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- B21L 11/06 the workpiece being of thin strip metal