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In a recent "same-party" joinder opinion, the PTAB broke with previous decisions to hold that it did not have authority under 35 U.S.C. § 315(c) to join new issues to an instituted IPR. Proppant Express Investments, LLC. V. Oren Technologies, LLC, Case IPR 2018-00914 (PTAB Nov. 8, 2018) (Paper 21).
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