Methods and apparatus for marketing contingent event certificates are disclosed. The disclosed method and apparatus enable existing registered users to purchase contingent event certificates as gifts for non-registered or pre-registered users. Once the new user is identified, the new user holds rights...http://www.google.fr/patents/US20060271462?utm_source=gb-gplus-shareBrevet US20060271462 - Methods and Apparatus for Marketing contingent Event Certificates
Methods and Apparatus for Marketing contingent Event Certificates