Yahoo patents granted on 19 November 2013

7 US patents granted on 19 November 2013 and assigned to Yahoo

1 8,589,804 Collaborative electronic books
2 8,589,782 System and method for bookmarking and tagging a content item
3 8,589,486 System and method for addressing communications
4 8,589,395 System and method for trail identification with search results
5 8,589,378 Topic-oriented diversified item recommendation
6 8,589,371 Learning retrieval functions incorporating query differentiation for information retrieval
7 8,589,231 Sensitivity categorization of web pages