Arista v Cisco: Fed Circuit says no assignor estoppel at PTAB
The US Court of Appeals for the Federal Circuit has ruled that assignor estoppel does not exist in the context of validity proceedings at the Patent Trial and Appeal Board (PTAB), in a long-running dispute between Arista Networks and Cisco Systems.
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7 August 2018 Arista Networks and Cisco Systems announced yesterday that they have reached a settlement in their long-running patent dispute with Arista paying Cisco $400 million.
3 November 2020 Cisco has demanded a new trial, after a US judge ordered the technology company to pay $1.9 billion in damages, in addition to royalties, for infringing four patents owned by Centripetal Networks.