The present invention provides a modular flooring system including a ramp to facilitate entry and exit from the flooring system. The ramp may be modular and interconnect with all or parts of a perimeter of the flooring system, and the ramp may also interconnect with adjacent ramp members....http://www.google.com/patents/US8166722?utm_source=gb-gplus-sharePatent US8166722 - Modular floor tile system with transition edge
