Yahoo patent applications published on 02 June 2011

4 US patent applications published on 02 June 2011 and assigned to Yahoo

1 20110131282 SYSTEM AND METHOD FOR AUTOMATICALLY BUILDING UP TOPIC-SPECIFIC MESSAGING IDENTITIES
2 20110131205 SYSTEM AND METHOD TO IDENTIFY CONTEXT-DEPENDENT TERM IMPORTANCE OF QUERIES FOR PREDICTING RELEVANT SEARCH ADVERTISEMENTS
3 20110131157 SYSTEM AND METHOD FOR PREDICTING CONTEXT-DEPENDENT TERM IMPORTANCE OF SEARCH QUERIES
4 20110131093 SYSTEM AND METHOD FOR OPTIMIZING SELECTION OF ONLINE ADVERTISEMENTS