FESTO DOCTRINE

Festo doctrine.Patents. The rule that the voluntary narrowing of a patent claim may give rise

to prosecution-history estoppel. Festo Corp. v. Shoketsu Kinzoku Kogyo Kabushiki Co., 304 F.3d

1289 (Fed. Cir. 2003). [Cases: Patents 168(2.2). C.J.S. Patents ยง 297.][Blacks Law 8th]