DIFF Subgroup
B21J 7/26 operated by internal combustion
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Hammers; Forging machines with hammers or die jaws acting by impact > Drives for hammers; Transmission means therefor > for power hammers > operated by steam, air, or other gaseous pressure > operated by internal combustion
CPC:
Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features in section H) > Drives for hammers; Transmission means therefor > for power hammers > operated by steam, air, or other gaseous pressure > operated by internal combustion
No child classifications to compare. This is a leaf node in both IPC and CPC.