Festo Corp. v. Shoketsu Kinzoku Kogyo Kabushiki Co. (Festo VIII)

Case Number: CLB0191

Date: 05.28.2002

Citation: 535 U.S. 722, 62 U.S.P.Q.2d 1705 (2002)

Regarding prosecution history estoppel, the Supreme Court establishes a presumption that a narrowing amendment made for a reason related to patentability surrenders the entire territory between the original and amended claim limitations, and that this presumption may be rebutted under certain instances.

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