US Patent 9670624 Double walled earth grabbing water permeable modular paver

A double walled earth grabbing water permeable modular paver having a first group of outer cells, a second group of outer cells, a third group of outer cells, a fourth outer cell, a fifth outer cell, and a plurality of inner cells. Each of the plurality of outer cells and inner cells further include an outer wall; an inner wall; a top surface; a plurality of structural support ribs; a permeable bottom portion engaging each inner wall; and a plurality gripping members extending from the permeable bottom portion.