A method and system for processing negotiable economic credits (e.g., cash, credit card, enterprise incentives/award such as frequent flier miles, etc.) through a hand held device. Credits are storable in the form of credit data in a credit database associated with a point of sale and/or hand held device....http://www.google.fr/patents/US7209733?utm_source=gb-gplus-shareBrevet US7209733 - Credit manager method and system
