Description
Class B32B : LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
Subclass 3/10: Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form (continuous layers of fibres or filaments B32B 5/02; foamed layers B32B 5/18); Layered products essentially having particular features of form (B32B 1/00 takes precedence) characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material