75511101
Jun 29, 1998
Concrete and masonry materials and products, namely concrete and masonry blocks, interlocking pavers, paving slabs, pavers and slabs, geogrid filter fabric to minimize exfiltration of soil through the blocks, pavers and slabs; non-metallic edging materials to be added to blocks, pavers and slabs; used to construct stairways and steps, terrace walls, serpentine walls, planters, and pavement of all types and retaining walls
Nonmetallic Building Materials