DYFAN, LLC v. TARGET CORP.

2021-1725.

28 F.4th 1360 (2022)

DYFAN, LLC, Plaintiff-Appellant v. TARGET CORPORATION, Defendant-Appellee.

United States Court of Appeals, Federal Circuit.

Decided: March 24, 2022.


Attorney(s) appearing for the Case

Derek Dahlgren , Devlin Law Firm LLC, Wilmington, DE, argued for plaintiff-appellant. Also represented by Timothy Devlin , Nadiia Loizides .

Christopher Joseph Tyson , Duane Morris LLP, Washington, DC, argued for defendant-appellee. Also represented by Matthew Yungwirth , Atlanta, GA.

Before Lourie, Dyk, and Stoll, Circuit Judges.


Dyfan, LLC appeals from the United States District Court for the Western District of Texas's final judgment of invalidity of the asserted patent claims. The district court held the claims invalid as indefinite under 35 U.S.C. § 112 ¶ 2 based on its view that certain claim limitations are in means-plus-function format...

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