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ARTICLE · 05 SEPTEMBER 2025

Acting Director Reverses Previous Discretionary Denial

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For the first time under the bifurcated institution procedures, the Acting Director reversed her own prior discretionary denial, citing changed circumstances based on a settlement in the parallel district court litigation.

United StatesIntellectual Property
Adam J. Cook
Adam J. Cook
Sarah A. Geers
Sarah A. Geers
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For the first time under the bifurcated institution procedures, the Acting Director reversed her own prior discretionary denial, citing changed circumstances based on a settlement in the parallel district court litigation. See Arm Ltd. v. Daedalus Prime LLC, No. IPR2025-00207, Paper 14 (P.T.A.B. Aug. 6, 2025).

In April 2024, Daedalus filed a complaint in the Eastern District of Texas against MediaTek, claiming that MediaTek had infringed eight chip technology patents. Compl., Daedalus Prime LLC v. MediaTek, Inc., No. 2:24-CV-00235 (E.D. Tex. Apr. 8, 2024). MediaTek challenged the validity of four of these patents in IPR petitions filed between October 2024 and January 2025. See IPR2024-01488; IPR2025-00100; IPR2025-00207; IPR2025-00243. In one of the four IPRs, a third party, Arm, joined MediaTek as a petitioner, challenging the validity of U.S. Patent No. 8,984,228 (the "'228 Patent"). In accordance with the new bifurcated procedure,

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