A system for trading media space includes a server node which receives requests for media space from buyers and offers of media space from sellers. The server node includes a set of rules for matching one of the requests and one of the offers to form a matched request and offer pair. A delivery system...http://www.google.com/patents/US7856378?utm_source=gb-gplus-sharePatent US7856378 - Method and system for facilitating trading of media space
