Google patents granted on 03 May 2011

4 US patents granted on 03 May 2011 and assigned to Google

1 7,937,582 Secure XML feeds
2 7,937,405 Serving advertisements based on content
3 7,937,396 Methods and systems for identifying paraphrases from an index of information items and associated sentence fragments
4 7,937,265 Paraphrase acquisition