The US Patent Office has issued Google two more patents.
One patent, for a similarity search engine - to check duplicate content - was first filed in 2001.
The other, Google's Digital Mapping Systems patent, describes 'various methods, systems and apparatus for implementing aspects of a digital mapping system'.
The similarity engine has had variations filed by IBM and Hitachi, according to a report by VNUNET.
Introducing SES Online
Want to view one of the sessions you missed or listen to an especially informative presenter a second time? SES New York sessions are available for purchase on ClickZ Academy's new e-Learning site. SES is now Online!