The Customer Activated Multi-Value (CAM) card provides a customer with a primary use as a transaction card which can be further activated to have a secondary use as a credit card. The CAM card can be activated as a transaction card or as a transaction card with a credit card feature. Activation of the...http://www.google.de/patents/US20040024672?utm_source=gb-gplus-sharePatent US20040024672 - Customer activated multi-value (CAM) card
