Google, Microsoft, and Yahoo have just been granted patents for elements of their search engines two more closely examine page addresses and URLs on dynamic websites. You may have noticed extremely long URLs appearing in the address bar after you have clicked on a search link, the new patents will allow the search engines to eliminate sections of the URL address without affecting the content displayed on the resulting page. By examining which parts of the address can be dropped, the search engines can more easily determine whether duplicate content exists at other URLs that show the same page. this highly technical article examines the process in detail and will assist your understanding of the way duplicate content it is dealt with by the search engines.