Federal Circuit, in an opinion authored by Judge Moore, affirmed the determination of the PTAB, holding that tribal sovereign immunity cannot be asserted in IPRs. the decision of the Federal Circuit is rather seriously flawed. The PTAB is simply not capable of exercising jurisdiction over a patent through in rem jurisdiction. The ruling of the PTAB only implicates the rights of certain persons, and because the patent and all patent claims remains open to challenge by others in the future. That truth means the PTAB acts, at best, quasi in rem, which thanks to Supreme Court jurisprudence should be extremely relevant when determining the applicability of tribal sovereign immunity.
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