Yahoo patents granted on 09 November 2010

6 US patents granted on 09 November 2010 and assigned to Yahoo

1 7,831,834 Associating a postmark with a message to indicate trust
2 7,831,595 Predicting and ranking search query results
3 7,831,588 Context-sensitive query expansion
4 7,831,474 System and method for associating an unvalued search term with a valued search term
5 7,831,456 Advertisement display depth optimization to maximize click activity page yield
6 7,831,111 Method and mechanism for retrieving images