A system and method is disclosed for providing a reward-based digital mobile coupon environment, where the digital coupons may be shared among peers. Consumers utilize mobile digital coupon carriers having digital representations of coupons. Sharing of coupons among peers may be rewarded with additional...http://www.google.de/patents/US20050131761?utm_source=gb-gplus-sharePatent US20050131761 - Mobile digital coupons
