A user who intends to install software notifies the sales company of such software of the user's own credit card information. Then, the software sales company communicates such credit card information to the credit company to request the confirmation thereof. If the credit company confirms the user to...http://www.google.com/patents/US20020066032?utm_source=gb-gplus-sharePatent US20020066032 - Method for issuing installation key and system thereof
