Comprising wood as the main or only constituent of a layer, which

Official title: comprising wood as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/042; next to a bituminous or tarry layer B32B11/042; next to a water setting substance layer B32B13/10; next to a metal layer B32B15/10; next to a glass layer B32B17/062; next to a layer formed of natural mineral fibres or particles B32B19/042; next to a cellulosic plastic layer B32B23/044)}

B32B21/04 (Comprising wood as the main or only constituent of a layer, which) appears on 1,673 US grants and 2,296 published applications in this corpus.