NOTE: This disposition is nonprecedential. 

## United States Court of Appeals for the Federal Circuit

2006-1411 O2 MICRO INTERNATIONAL LIMITED, Plaintiff-Appellee,

v. TAIWAN SUMIDA EL ECTRONICS, INC., Defendant-Appellant.

Henry C. Bunsow , Howrey LLP, of San Francisco , California, ar gued for plaintiffappellee. On the brief were Duane H. Mathiowetz , Rick C. Chang ; and Patricia L. Peden , Law Office of Patricia L. Ped en, of Oakland, California; and Richard L. Stanley , Howrey LLP, of Houston, Texas. Of counsel was Korula T. Cherian , Howrey LLP, of San Francisco, California; and Helen E. Dutton , Farella Braun & Martel LLP, of San Francisco, California. Nathan Lane, III , Squire, Sanders & Dempsey, LLP, of San Francisco, California, argued for defendant-appellant. Wi th him on the brief were Joseph A. Meckes and Daniel B. Pollack . Of counsel on the brief was Phillip J. McCabe , Kenyon & Kenyon, of San Jose, California. Of counsel was Eric M. Albritton , Albritton Law Firm, of Longview, Texas. Appealed from: United States District C ourt for the Eastern District of Texas Judge T. John WardNOTE: This disposit ion is nonprecedential. 

## United States Court of Appeals for the Federal Circuit

2006-1411 O2 MICRO INTERNATIONAL LIMITED, Plaintiff-Appellee,

v. TAIWAN SUMIDA EL ECTRONICS, INC., Defendant-Appellant Appeal from the United States District Court for the Eastern District of Texas in Case No. 2:03-CV-00007, Judge T. John Ward.

__________________ _________ DECIDED: March 5, 2009

__________________ _________ Before RADER, PLAGER, and GAJARSA, Circuit Judges. RADER, Circuit Judge

. In the instant case, a jury in the Un ited States District Court for the Eastern

District of Texas returned a verdict findi ng that Taiwan Sumida Electronics, Inc. (“Taiwan Sumida”) contributed to or induced the infringement of claims 1, 2, 9, 12 and 18 of O2 Micro International, Ltd.’s (“O2 Micro’s”) U.S. Patent No. 6,396,722 (“’722 patent”), that the infringement was willful, and that those claims had not been proven invalid. The instant case is a companion case to Monolithic Power Systems, Inc. v. O2 Micro International, Ltd. , No. 2008-1128, -1136 (the “MPS case ”), decided by this court today. In the MPS case, this court holds that the same claims of O2 Micro’s ’722 patent

are invalid as obvious under 35 U.S.C. § 103.2006-1411 2 This court held in Mendenhall v. Barber-Greene Co. , 26 F.3d 1573, 1577 (Fed. Cir. 1994) that “once the claims of a patent are held invali d in a suit involving one alleged infringer, an unrelated pa rty who is sued for infringement of those claims may reap the benefit of the invalidity decision under principles of collateral estoppel.” (citing Blonder-Tongue Labs., Inc. v. University of Ill. Found. , 402 U.S. 313, 350 (1971)). O2 Micro, in a letter to this court, has conceded that the judgment in t he instant case cannot be upheld, as per Mendenhall , if this court affirms the invalidity judgment in the MPS case. Because today’s judgment of invalidity of the asserted claims of the ’722 patent in the MPS case collaterally est ops O2 Micro from pursuing infringement claims against Taiwan Sumida based on the same claims of the ’722 patent, this court vacates the judgment of the District Court for the Eastern District of Texas.

VACATED

NO COSTS