US Patent 7356495 Supply chain management using item detection system

A system to monitor item placement and item movement on surfaces includes an identification system embedded in one or more surfaces and a computer. The identification system periodically scans the surfaces to generate data related to items placed on the surfaces. The data includes item type, item location on each surface, and number of items placed on each surface. The computer receives and processes the data to monitor item placement and item movement on the surfaces.