Google patents granted on 08 September 2009

6 US patents granted on 08 September 2009 and assigned to Google

1 7,587,461 Method and system for activity based email sorting
2 7,587,398 System and method of accessing a document efficiently through multi-tier web caching
3 7,587,391 Method and apparatus for generating a preference ranking
4 7,587,387 User interface for facts query engine with snippets from information sources that include query terms and answer terms
5 7,587,309 System and method for providing text summarization for use in web-based content
6 7,586,655 Acquiring and using three-dimensional information in a document scanning system