The present invention is a device and method for filtering information, the device comprising a document database storing document data to be filtered, a reproduced document information storing unit storing fundamental document data used for detection of documents, newly created or updated, a detecting...http://www.google.co.uk/patents/US6092091?utm_source=gb-gplus-sharePatent US6092091 - Device and method for filtering information, device and method for monitoring updated document information and information storage medium used in same devices
