Nos. 2009-1364, 2009-1365.

600 F.3d 1357 (2010)

HEARING COMPONENTS, INC., Plaintiff-Appellant, v. SHURE INC., Defendant-Cross Appellant.

United States Court of Appeals, Federal Circuit.

April 1, 2010.

Attorney(s) appearing for the Case

Kevin M. Flannery, Dechert LLP, of Philadelphia, PA, argued for plaintiff-appellant. With him on the brief were Joseph R. Heffern and Vincent A. Gallo.

Marc S. Cooperman, Banner & Witcoff, Ltd., of Chicago, IL, argued for defendant-cross appellant. With him on the brief were J. Peter van Es, Erik S. Maurer, Bradley J. Van Pelt and Katherine L. Fink.

Before LOURIE, RADER and SCHALL, Circuit Judges.

LOURIE, Circuit Judge.

Hearing Components, Inc. ("Hearing Components") appeals from the judgment of the United States District Court for the Eastern District of Texas determining that claims 1 and 2 of U.S. Patent 5,401,920 (the "'920 patent") are invalid as being indefinite. Hearing Components, Inc. v. Shure, Inc., No. 9:07-CV-104, slip op. at 11-13, 2008 WL 6763141 (E.D.Tex. Dec. 1, 2008) ("Claim Construction...

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