A process for coupon generation, delivery, and validation over a personal TV service system is disclosed. A client issues electronic coupons to personal TV service customers via a personal TV service center which generates a coupon authentication number for each receiver. The coupon authentication number...http://www.google.es/patents/US7055031?utm_source=gb-gplus-sharePatente US7055031 - Method for generation, delivery, and validation of electronic coupons through personal TV service system
Method for generation, delivery, and validation of electronic coupons ...
