IPC Definitions - January 01, 2012
B21D 26/053 - Definition
This group covers:
Devices and methods for deforming metal bodies by applying fluid pressure which are characterized by the material, composition or constituents of the bodies to be deformed.
Special rules of classification
When the invention is characterized by the adaptation to deforming metal bodies with a particular material feature in combination with the shape of the bodies to be deformed, the invention shall also be classified in B21D 26/021 or B21D 26/033 and their subgroups.