DIFF Subgroup
B21D 26/12 initiated by spark discharge
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces > by applying fluid pressure > by shock waves > initiated by spark discharge
CPC:
Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces (stamping using resilient pads B21D22/10) > by applying fluid pressure > by shock waves > initiated by spark discharge
No child classifications to compare. This is a leaf node in both IPC and CPC.