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PCE
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DIFF Subgroup
B32B 3/22

of spaced pieces

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form > characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material > characterised by an internal layer formed of separate pieces of material > of spaced pieces

CPC:

Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form > characterised by a discontinuous layer, i.e. formed of separate pieces of material > characterised by an internal layer formed of separate pieces of material > of spaced pieces

No child classifications to compare. This is a leaf node in both IPC and CPC.