(under subclass 596) Structure in which the stone-like module has a plurality of integral projections thereon which act to space the major surface of the module from another or from a subsurface.
SEE OR SEARCH THIS CLASS, SUBCLASS:
267, for walls or spaced layers enclosing a space wall.
578+, for a module or panel with a feature specialized to forming an edge-to-edge connection.
592.5, for a module with integral mating key means providing an internal space.
604, for another construction formed by particularly related modules, e.g., by spacers.
605, for a stone-like module with grooves coextensive with, a major surface. 712+, for sheet or wire tires which may act as spacers.
