• All sections
• E - Fixed constructions
• E04B - General building constructionswalls, e.g. partitionsroofsfloorsceilingsinsulation or other protection of buildings
• E04B 2/18 - Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element using elements having specially designed means for stabilising the position by interlocking of projections or inserts with indentations, e.g. of tongues, grooves, dovetails

Patent holdings for IPC class E04B 2/18

Total number of patents in this class: 198

10-year publication summary

Principal owners for this class