• All sections
• E - Fixed constructions
• E04C - Structural elementsbuilding materials
• E04C 2/28 - Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups , , , or of materials covered by one of these groups with a material not specified in one of these groups combinations of materials fully covered by groups and

Patent holdings for IPC class E04C 2/28

Total number of patents in this class: 126

10-year publication summary

Principal owners for this class