US Patent 7072854 Payment system by means of a mobile device

Performance of payment processes, in whicha cash register transmits a payment demand wirelessly to a mobile device of a customer,the latter checks the payment demand,if the result is positive, generates from it a payment instruction,transmits the latter to a payment center,the payment center checks the payment instruction,if the result is positive, the payment center sends a payment confirmation to the cash register,the cash register checks the payment confirmation,if the result is positive, indicates this and releases goods to be paid for.