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lawsuitdamagesliabilityappealpleamotionwillpatentcorporation
damagespleamotionwillpatent

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Exergen Corp. v. Wal-Mart Stores, Inc., 575 F.3d 1312, 91 U.S.P.Q.2d 1656

Facts

Exergen Corporation, the owner of three patents related to infrared thermometers for measuring human body temperature, initiated an infringement lawsuit against SAAT Systems Application of Advanced Technology, Ltd. and Daiwa Products, Inc. SAAT countered with defenses of noninfringement and invalidity. After a jury found willful infringement and awarded damages to Exergen, SAAT's motions for judgment as a matter of law and to amend its pleadings were denied. Both parties subsequently appealed the decisions.

Exergen sued SAAT for infringement of the _813 and _205 patents on July 27, 2001. The _685 patent issued on September 18, 2001, and was added to the suit on October 2, 2001. SAAT answered by asserting affirmative defenses and counterclaims of both noninfringement and invalidity.

Issue

Whether the jury's findings of willful infringement, the validity of the patents, and the denial of SAAT's motion for judgment as a matter of law were correct.

Whether the jury's findings of willful infringement, the validity of the patents, and the denial of SAAT's motion for judgment as a matter of law were correct.

Rule

In patent law, anticipation and infringement are questions of fact reviewed for substantial evidence. A patent claim is anticipated if a single prior art reference discloses each claim limitation. Direct infringement requires performance of every step of a claimed method, while active inducement necessitates proof of direct infringement and intent to encourage infringement. Inequitable conduct must be pled with particularity under Rule 9(b).

Anticipation and infringement of a patent are both questions of fact, which, when found by a jury, are generally reviewed for substantial evidence. The denial of a motion to amend a pleading is a procedural matter governed by the law of the regional circuit. Fed.Rules Civ.Proc.Rule 15(a), 28 U.S.C.A.

Analysis

The court analyzed the jury's findings regarding the validity of Exergen's patents and the alleged infringement by SAAT. It determined that the first patent was invalid due to anticipation by prior art, while the second patent was not directly infringed by SAAT's device. The court also found that SAAT did not actively induce infringement of the third patent, as there was no evidence of direct infringement. The court concluded that the jury's findings lacked substantial evidence.

The court analyzed the jury's findings regarding the validity of Exergen's patents and the alleged infringement by SAAT. It determined that the first patent was invalid due to anticipation by prior art, while the second patent was not directly infringed by SAAT's device. The court also found that SAAT did not actively induce infringement of the third patent, as there was no evidence of direct infringement.

Conclusion

The Court of Appeals affirmed in part and reversed in part, concluding that the first patent was invalid, the second patent was not infringed, and the third patent did not have active inducement of infringement.

We conclude that all claims of the _205 patent are anticipated and that no substantial evidence supports the jury's contrary finding. Furthermore, we conclude that Exergen failed to introduce substantial evidence to support the jury's finding that the _813 and _685 patents are infringed.

Who won?

The prevailing party in this case is SAAT Systems Application of Advanced Technology, Ltd. and Daiwa Products, Inc. The court found that the jury's findings of infringement were not supported by substantial evidence, leading to the reversal of the damages awarded to Exergen. The court's determination that the patents were invalid or not infringed effectively cleared SAAT of liability.

The prevailing party in this case is SAAT Systems Application of Advanced Technology, Ltd. and Daiwa Products, Inc. The court found that the jury's findings of infringement were not supported by substantial evidence, leading to the reversal of the damages awarded to Exergen.

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