Yahoo patents granted on 10 January 2012

6 US patents granted on 10 January 2012 and assigned to Yahoo

1 8,095,560 Edge attribute aggregation in a directed graph
2 8,095,547 Method and apparatus for detecting spam user created content
3 8,095,545 System and methodology for a multi-site search engine
4 8,095,540 Identifying superphrases of text strings
5 8,095,487 System and method for biasing search results based on topic familiarity
6 8,095,419 Search score for the determination of search quality