IPC Subgroup
B21D 41/04 Reducing; Closing
Introduced: September 1968
Last revised: January 2006
Full Title
Application of procedures in order to alter the diameter of tube ends > Reducing; Closing
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