Patent ID: 7637688

Claim:
A single integrally formed building unit having a planar configuration comprising a plurality of primary elements, each said primary element comprising first and second sides extending in a generally radial direction relative to a first vertex and being rotationally spaced from each other by a first angle; third and fourth sides extending in a generally radial direction from a second vertex, said second vertex being spaced apart from said first vertex, said third and fourth sides being rotationally spaced from each other by a second angle; fifth and sixth sides extending in a generally radial direction relative to a third vertex, said third vertex being spaced apart from both the first and second vertices, said fifth and sixth sides being rotationally spaced from each other by a third angle; said first, second and third angles being substantially 120 degrees; said first, second, third, fourth, fifth and sixth sides all being irregularly shaped and comprising substantially images of each other.