http://otd.oyez.org/topics/patentability Browse a table listing of Cases by Topic en http://otd.oyez.org/cases/estoppel/festo-corp-v-shoketsu-kinzoku-kogyo-kabushiki-co doctrine of equivalents estoppel patentability Patents Wed, 23 Jun 2004 14:52:28 -0500 admin 26147 at http://otd.oyez.org