Patent ID: 7993718
Filing Date: 2011-08-09
Classification: B44C,B44F,E01C,E04B,E04C,E04F,Y10T

Abstract:
1. A building unit system comprising a multiplicity of units fit together to form a surface or structure that is continuous without overlap between units or large gaps between units, each of said units comprising at least one face that comprises multiple irregularly shaped sides, each of said sides comprising a series of multiple straight-line segments, each said segment being angled relative to adjacent segments such that the general appearance of each said side is irregular, and adjacent sides of fit together units form a gap of varying width to provide natural appearance; wherein said face of each said unit comprises a primary rotational tessellation having at least three spaced apart vertices and a pair of sides extending from each of said vertices, each side in each pair of sides being a rotational image of the other side in said pair.