Building elements of block or other shape for the construction of parts

Official title: Building elements of block or other shape for the construction of parts of buildings (of relatively thin form E04C2/00; structural elongated elements designed for load-supporting E04C3/00, e.g. columns or pillars E04C3/30; manufacture or material of building bricks, stones, or the like B28, C03, C04; paving elements E01C; general building constructions E04B, e.g. walls E04B2/00, floors E04B5/00, roofs E04B7/00, ceilings E04B9/00; {roof coverings E04D; coverings for walls or ceilings E04F13/00; floorings E04F15/00;} structural elements specially designed for built-in conduit shafts E04F17/00; {elements for buildings for particular purposes E04H7/00}; special elements for building ovens or furnaces F24B, F27D)

E04C1/00 (Building elements of block or other shape for the construction of parts) appears on 1,151 US grants and 1,070 published applications in this corpus.