No. 2006-1188.

474 F.3d 1344 (2007)

HYDRIL COMPANY LP, and Hydril U.K. Ltd., Plaintiffs-Appellants, v. GRANT PRIDECO LP and Grant Prideco, Inc., Defendants-Appellees, and Atlantic Richfield Company, Defendant.

United States Court of Appeals, Federal Circuit.

January 25, 2007.

Attorney(s) appearing for the Case

Michael Hawes, Baker Botts L.L.P., of Houston, TX, argued for plaintiffs-appellants. With him on the brief were Mitchell Lukin and David M. Rodi.

William J. Boyce, Fulbright & Jaworski L.L.P., of Houston, TX, argued for defendants-appellees. With him on the brief were Gerard G. Pecht and Paul Krieger.

Before MAYER, Circuit Judge, FRIEDMAN, Senior Circuit Judge, and BRYSON, Circuit Judge.

Dissenting opinion by Circuit Judge MAYER.

FRIEDMAN, Senior Circuit Judge.

This appeal challenges the district court's dismissal, under Rule 12(b)(6) of the Federal Rules of Civil Procedure for failure to state a valid claim for relief, of a complaint alleging that the defendant (1) monopolized two product markets by enforcing a patent that had been obtained by fraud on the Patent and Trademark Office, (2) infringed a different patent that the appellant owns...

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