Patent ID: 8298641
Filing Date: 2012-10-30
Classification: B44C,B44F,E01C,E02D,E04B,E04C,E04F,Y10T

Abstract:
1. A building unit system comprising multiple units adapted to mate with one another and cover a surface without substantial gaps or overlaps, each unit comprising at least one face, at least two pairs of sides, each side having at least one projection recessed from said face and a visible edge at said face, one said pair of sides having a different length or shape from a second said pair of sides, the sides in each pair of sides having the same length between end points, and being images of each other, each side having an irregular configuration and not forming a single straight line or smooth curve between end points, gaps of variable width being defined between the visible edges of adjacent units, and wherein angles are formed between said sides, and none of said angles is 90 degrees.