RFID tags attached to a product contain information regarding the product and communicate this information to a reader. This information can include the age of the product, the amount of product left and preparation or care instructions for the product. To record the age of a product, a timer is initiated...http://www.google.sh/patents/US7009519?utm_source=gb-gplus-sharePatent US7009519 - Product dispensing controlled by RFID tags
