Yahoo patents granted on 14 December 2010

5 US patents granted on 14 December 2010 and assigned to Yahoo

1 7,853,721 System and method for transmission of DNS beacons
2 7,853,670 System and method for detecting and verifying digitized content over a computer network
3 7,853,583 System and method for generating expertise based search results
4 7,853,270 System for geographically contextualizing data items
5 7,853,248 SMS spam control