A promotional scheme involving the design, distribution and redemption of electronic coupons involves defining the structure of a promotional offer to be made to customers, in which the offer has associated parameters, one or more of which are unspecified or variable. The offer is targeted to customers,...http://www.google.com.hk/patents/US20030154125?utm_source=gb-gplus-share專利 US20030154125 - Pesonalisation of promotional offers
