IPC Subgroup
B21K 3/02 cylinder heads
Introduced: September 1968
Last revised: January 2006
Full Title
Making engine or like machine parts not covered by; Making propellers or the like > cylinder heads
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