@patent{WesEliSchPerGuy09, title = {Pre−processed feature ranking for a support vector machine}, author = {Weston, J. and Elisseeff, A. and Sch{\"o}lkopf, B. and P\'{e}rez-Cruz, F. and Guyon, I.}, howpublished = {United States Patent, No. 7475048}, month = jan, year = {2009}, note = {(expired)}, doi = {}, month_numeric = {1} }