An information device, an information device, an information server, an information processing system, an information processing method and an information processing program which can prevent an illegal extension of an expiration date while allowing the same user to redownload a license are provided....http://www.google.co.uk/patents/US20060294017?utm_source=gb-gplus-sharePatent US20060294017 - Information server, information device, information processing system, information processing method, and informaiton processing program
