IPC Subgroup
B21D 28/3 in annular parts, e.g. rims
Introduced: September 1968
Last revised: January 2006
Full Title
Shaping by press-cutting; Perforating > Perforating, i.e. punching holes > in annular parts, e.g. rims
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL