The present invention is a system and method for providing access to electronic works over a network. In a preferred embodiment, the present invention offers a user access to electronic copies of works, such as songs, albums, movies, or music videos, over a network. The user responds to the offer by...http://www.google.com.hk/patents/US20020082922?utm_source=gb-gplus-share專利 US20020082922 - System and method for providing access to electronic works
