CPC Main Group
B21F 37/00 Manufacture of rings from wire
2 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- B21F 37/02 of resilient rings, e.g. key-rings
- B21F 37/04 of washers (B21F37/02 takes precedence)
Search Classifications
Search for IPC and CPC classification codes or keywords