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35 U.S.C. § 287(a) and the Burdens of Providing Notice for Pre-Suit Damages: Packet Intelligence LLC, v. Netscout Systems, Inc.

In Packet Intelligence LLC, v. Netscout Systems, Inc. the Federal Circuit reversed a jury determination for pre-suit damages, and vacated an enhancement of such damages, for Netscout’s infringement of U.S. Patent 6,665,725, U.S. Patent 6,839,751, and U.S. Patent 6,954,789, all owned by Packet Intelligence. The patents at issue were all directed to monitoring packets exchanged over a computer network. The ‘798 patent includes system claims, and the ‘725 and ‘751 patents include method claims. It was important in this case that infringement of the various system and method claims have different requirements to qualify for pre-suit damages. Pre-suit damages for the system claims are controlled by the marking requirements of 35 U.S.C. § 287(a), whereas pre-suit damages for the method claims are not. With respect to the method claims of the ‘725 and ‘751 patents, Packet Intelligence argued that evidence of direct infringement of the ‘725 and ‘751 patents was…

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