Transaction card comprising a substrate having a front face and a back face, a first magnetic stripe for storing data associated with a credit account, the first magnetic stripe being located along an edge of the back face, a second magnetic stripe for storing data associated with a rewards account,...http://www.google.es/patents/US7090138?utm_source=gb-gplus-sharePatente US7090138 - System and method for redeeming rewards and incentives
System and method for redeeming rewards and incentives
