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Combatting Lack of Assignor Estoppel in IPRs (Maybe), PTAB Litigation Blog

December 2018


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Assignor estoppel is an equitable doctrine that prevents a party who assigns a patent to another from later challenging the validity of the assigned patent. As reported in a prior post, the Federal Circuit recently stated that assignor estoppel does not apply to inter partes review (IPR) proceedings.

Read the full article at ptablitigationblog.com.