Systems and methods applicable, for example, in allowing a user to come to possess a physical entity that allows for the receipt, use, access, and/or the like of a virtual entity (e.g., a media item, software, a service, data, and/or the like). A number of form factors for physical entities might be...http://www.google.com.hk/patents/US20050085946?utm_source=gb-gplus-share專利 US20050085946 - System and method for content vending
