Yahoo patents granted on 08 March 2011

6 US patents granted on 08 March 2011 and assigned to Yahoo

1 7,904,448 Incremental update of long-term and short-term user profile scores in a behavioral targeting system
2 7,904,435 System and method for resource lock acquisition and reclamation in a network file system environment
3 7,904,409 System and method for global load balancing of requests for content based on membership status of a user with one or more subscription services
4 7,904,303 Engagement-oriented recommendation principle
5 7,904,062 Scrolling mobile advertisements
6 7,903,819 Memory efficient storage of large numbers of key value pairs