2017-1525, 2017-1577.

908 F.3d 792 (2018)

ARISTA NETWORKS, INC., Appellant v. CISCO SYSTEMS, INC., Cross-Appellant.

United States Court of Appeals, Federal Circuit.

Decided: November 9, 2018.

Attorney(s) appearing for the Case

LAUREN ANN DEGNAN , Fish & Richardson, PC, Washington, DC, and MATTHEW D. POWERS , Tensegrity Law Group LLP, Redwood Shores, CA, argued for appellant. Also represented by MICHAEL J. McKEON , ADAM SHARTZER , LINHONG ZHANG , Fish & Richardson, PC, Washington, DC; ROBERT LEWIS GERRITY , WILLIAM P. NELSON , Tensegrity Law Group LLP, Redwood Shores, CA.

JOHN C. O'QUINN , Kirkland & Ellis LLP, Washington, DC, argued for cross-appellant. Also represented by CALVIN ALEXANDER SHANK , JASON M. WILCOX , WILLIAM H. BURGESS ; JON WRIGHT , DANIEL S. BLOCK , LORI A. GORDON , Sterne Kessler Goldstein & Fox, PLLC, Washington, DC.

Before Prost, Chief Judge, Schall and Chen, Circuit Judges.

Arista Networks, Inc. ("Arista") petitioned for an inter partes review ("IPR") of certain claims of U.S. Patent No. 7,340,597 ("the '597 patent"), which is owned by Cisco Systems, Inc. ("Cisco"). After instituting an IPR, the Patent Trial and Appeal Board ("Board") upheld some of those challenged claims as patentable but...

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