Short Summary
Cisco Systems challenges Portsmouth Network Corporation's patent via IPR, arguing that the claimed ring topology flow allocation methods are obvious. The petitioner asserts that combining prior art references like Kovvali and Kalman renders the claims unpatentable under 35 U.S.C. § 103.
Detailed Summary
Cisco Systems, Inc., in its Petition for Inter Partes Review (IPR), challenges 18 claims of Portsmouth Network Corporation's patent (U.S. 7,035,279). The petitioner asserts that the claimed flow allocation methods within a ring topology are obvious under 35 U.S.C. § 103(a). Cisco argues that combining teachings from prior art references—specifically Kovvali and Kalman for dynamic resource allocation and path selection, and RFC2892 for fairness algorithms—would have been apparent to a Person Having Ordinary Skill in the Art (POSITA). The petition also cites Masters for general principles of cost-based routing.
Practitioner Note
This case demonstrates the evidentiary and procedural standards applied in patent matters before local courts. Understanding the court's reasoning in Cisco Systems, Inc. vs Portsmouth Network Corporation is valuable context for structuring arguments or assessing risk in similar proceedings.
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