METHODS AND APPARATUS FOR EFFICIENTLY PROCESSING MULTIPLE KEYWORD QUERIES ON A… Application EP-2454656-A4 European Patent Office 25 Feb 2015
METHODS AND APPARATUS FOR EFFICIENTLY PROCESSING MULTIPLE KEYWORD QUERIES ON A… Application EP-2454656-A2 European Patent Office 23 May 2012
Methods and apparatus for efficiently processing multiple keyword queries on a… Application CN-102473084-A China 23 May 2012