Festo Corp. v. Shoketsu Kinzoku Kogyo Kabushiki Co., 535 U.S. 722, 5 (2002)

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726

FESTO CORP. v. SHOKETSU KINZOKU KOGYO KABUSHIKI CO.

Opinion of the Court

Justice Kennedy delivered the opinion of the Court.

This case requires us to address once again the relation between two patent law concepts, the doctrine of equivalents and the rule of prosecution history estoppel. The Court considered the same concepts in Warner-Jenkinson Co. v. Hilton Davis Chemical Co., 520 U. S. 17 (1997), and reafAktiengesellschaft by Steven B. Kelber; for Bose Corp. by Charles Hieken and Frank P. Porcelli; for Celltech Group plc. by Donald S. Chisum; for Chiron Corp. by Mr. Chisum; for the Federal Circuit Bar Association by Claire Laporte, Mitchell J. Matorin, and George E. Hutchinson; for Fédération Internationale des Conseils en Propriété Industrielle by Maxim H. Waldbaum, Raymond C. Stewart, John P. Sutton, and Tipton D. Jennings IV; for the Houston Intellectual Property Law Association by Sharon A. Israel; for Intellectual Property Creators et al. by Steven L. Winter; for Litton Systems, Inc., by John G. Roberts, Jr., Catherine E. Stetson, Rory J. Radding, and Stanton T. Lawrence III; for the Minnesota Mining and Manufacturing Co. et al. by Carter G. Phillips, Joseph R. Guerra, Mark E. Haddad, Gary L. Griswold, Robert A. Armitage, Philip S. Johnson, Wayne C. Jaeschke, Peter C. Richardson, and Kenneth Olson; for the National Bar Association by Edward W. Gray, Jr., Kendrew H. Colton, and John Moses; for the National Intellectual Property Law Institute by James Phillip Chandler; for the Wisconsin Alumni Research Foundation et al. by Susan G. Braden, Kevin M. O'Brien, and Michael E. Murphy; and for Vincent P. Tassinari by Mr. Tassinari, pro se.

Briefs of amici curiae urging affirmance were filed for the Consumer Project on Technology by Joshua D. Sarnoff; for Genentech, Inc., by Jeffrey P. Kushan and Marinn F. Carlson; for Intel Corp. et al. by Terry E. Fenzl, Alan H. Blankenheimer, and Howard Ross Cabot; and for International Business Machines Corp. et al. by Christopher A. Hughes, Mark J. Abate, Frederick T. Boehm, Mark F. Chadurjian, William J. Coughlin, Barry Estrin, and Richard Whiting.

Briefs of amici curiae were filed for Applera Corp. et al. by Matthew D. Powers and Edward R. Reines; for the Institute of Electrical and Electronics Engineers-United States of America by Andrew C. Greenberg and Matthew J. Conigliaro; for Medimmune, Inc., by Harvey Kurzweil and Henry J. Ricardo; for the Patent, Trademark, & Copyright Section of the Bar Association of the District of Columbia by William P. Atkins; for the Philadelphia Intellectual Property Law Association by Joan Taft Kluger and Manny D. Pokotilow; and for Sean Patrick Suiter by Mr. Suiter, pro se.

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