@patent{HeiPlaSchSim06, title = {Acquiring web page information without commitment to downloading the web page}, author = {Heilbron, L. and Platt, J. C. and Sch{\"o}lkopf, B. and Simard, P. Y.}, howpublished = {United States Patent, No 7155489}, month = dec, year = {2006}, note = {(expired)}, doi = {}, month_numeric = {12} }