A floor mat system having a plurality of floor mats and a frame assembly which prevents the floor mats from lifting and causing a tripping hazard to persons walking thereover. The floor mats may include carpeted sections over a plurality of orthagonally disposed spaced ribs. The frame assembly includes...http://www.google.es/patents/US7043792?utm_source=gb-gplus-sharePatente US7043792 - Floor mat system with flanged cover
