DIFF Subgroup
B29C 44/04 consisting of at least two parts of chemically or physically different materials, e.g. having different densities
Introduced: January 1995
Full Title
Shaping by internal pressure generated in the material, e.g. swelling or foaming > for articles of definite length, i.e. discrete articles > consisting of at least two parts of chemically or physically different materials, e.g. having different densities
CPC subdivides this area 9x more granularly than IPC with 8 additional codes.
8 codes are CPC-only extensions.
IPC defines codes here since 1995.
Child Classifications
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