Patent ID: 7674067
Filing Date: 2010-03-09
Classification: B44C,B44F,E01C,E04B,E04C,E04F,Y10T

Abstract:
1. A tessellated surface covering or structure comprised of a multiplicity of units, each of said units having at least one face and plural sides, each said side having a projection recessed from the face and a visible edge at the face of each unit; the side edge of each unit being irregularly shaped; the side projections of each unit defining a primary rotational element comprised of three pairs of sides, each pair of sides extending from a respective vertex, the sides of each pair being substantial rotational images of each other and being rotationally spaced from each other by an angle of 360 degrees divided by n, where n is an integer greater than or equal to 2; side projections of each said unit being adapted to mate with adjacent said units in the surface covering or structure, gaps of variable width being defined between the visible edges of adjacent units, such that the surface covering or structure has a natural appearance.