An interactive Internet-based Coupon Barcode Verification system comprises a central computer system connected to the Internet. The system is adapted to be accessed by one or more authorized personal computers. A browser and keyboard, and optionally a barcode reader, constitute the minimal hardware and...http://www.google.de/patents/US20040103023?utm_source=gb-gplus-sharePatent US20040103023 - Coupon barcode internet verification system
