Precast patio blocks

Claim 1

A RECTANGULAR PAVEMENT OF REGULAR OUTLINE, SUCH AS A PATIO; SAID PAVEMENT HAVING A REGULAR PATTERN AND BEING MADE UP OF BLOCKS AND HAVING VISIBLE TOP SURFACE COLOR CONTRAST STRIPES BETWEEN THE BLOCKS; SAID BLOCKS BEING ARRANGED IN EDGE-TO EDGE RELATION AND COMPRISING THIN, FACTORY PRECAST STONE, RECTANGULAR BLOCKS OF A VARIETY OF RELATIVELY LARGE LENGTHS AND WIDTHS; CERTAIN OF THE BLOCKS BEING SQUARES AND OTHER OBLONGS; AND EACH HAVING FOUR EDGES; THE BLOCKS HAVING A UNIFORM THICKNESS NOT LESS THAN ONE INCH AND NOT OVER TWO INCHES; WITH THE UPPER PARTS ONLY OF THE EDGES BEING BEVELLED ALL AROUND, TO LEAVE THE LOWER PARTS OF THE EDGES PERPENDICULAR TO THE TOP SURFACES TO PROVIDE EDGE-TOEDGE SEALS OF SUBSTANTIAL HEIGHT APPROXIMATELY ONEHALF INCH; AND COLOR CONTRAST MATERIAL FILLING THE GROOVES ON THE SURFACE OF THE PAVEMENT ESTABLISHED BY THE BEVELS OF THE UPPER EDGES OF THE BLOCKS; AND WITH EACH WIDTH BEING AT LEAST SIX TIMES THE THICKNESS; AND WITH THE VARIOUS LENGTHS BEING INTEGRAL MULTIPLES OF THE VARIOUS WIDTHS, SAID LENGTHS BEING SELECTED FROM A GROUP OF LENGTHS COMPRISING ONCE THE WIDTH AND TWICE THE WIDTH.