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Decisions Suggest That Estoppel Arising From IPR Is Narrower Than Anticipated

, New York Law Journal

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Scott W. Doyle, Jonathan R. DeFosse and Arvind Iyengar write that at the time the America Invents Act was enacted, it was widely believed to represent a broad prohibition on later raising prior art invalidity arguments based on any printed publications or patents that could have been included in an inter partes review petition. Over the last year however, courts have suggested that the scope of the IPR estoppel provision is more limited than many originally anticipated.

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