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Intellectual Property Rights: Establishing IPR Estoppel

Party asserting IPR estoppel bears the burden of proof because it is the party asserting and seeking benefit from the affirmative defense of IPR estoppel. Reasoning consistent with general principle that party asserting an affirmative defense bears the burden to prove it. ....

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Ironburg Inventions Ltd. v. Valve Corp. 21-2296 (Fed. Cir. Apr. 3, 2023) | Sheppard Mullin Richter & Hampton LLP

This case addresses the “skilled and diligent searcher” standard used for establishing Inter Partes Review (“IPR”) estoppel (or lack thereof). In particular, this case establishes: (1). ....

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