Yahoo patents granted on 19 October 2010

4 US patents granted on 19 October 2010 and assigned to Yahoo

1 7,818,534 Determination of sampling characteristics based on available memory
2 7,818,397 Providing a server agent for a mobile device with refresh
3 7,818,350 System and method for creating a collaborative playlist
4 7,818,320 Enhanced search results based on user feedback relating to search result abstracts