Disclosed are methods and systems for redeeming virtual coupons by associating the coupons with consumers' credit cards for redemption. In disclosed methods, coupon databases are associated with consumers and associated with the consumers' credit cards. Coupon offers are stored in the coupon databases...http://www.google.com.tw/patents/US20050071230?utm_source=gb-gplus-share專利 US20050071230 - Delivery, organization, and redemption of virtual offers from the internet, interactive-TV, wireless devices and other electronic means
