US Patent 7175899 Universal mat with removable strips

A rubber or plastic floor mat has a series of parallel upper ribs on its upper surface which define slots in which respective strips or carpeting or the like are removably held. The strips are retained along their lengths by retaining means which run continually or continuously along the slots. The strip retainers include hook-and-loop fasteners (e.g., VELCRO), and/or overhanging edges above the strip edges, preferably formed in one-piece fashion along the side of the upper ribs adjacent the slots. The overhangs may be interrupted, e.g., crenelated as seen from above, and may include bevels.