Yahoo patents granted on 13 January 2015

4 US patents granted on 13 January 2015 and assigned to Yahoo

1 8,935,400 Smartlink system and method
2 8,935,194 Clustering cookies for identifying unique mobile devices
3 8,935,177 Method and system for anonymous measurement of online advertisement using offline sales
4 8,934,545 Extraction of video fingerprints and identification of multimedia using video fingerprinting