PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US patent 8923754. This proceeding resulted in a discretionary denial of institution, meaning no claims were invalidated. This gives a defendant a posture where the patent's claims remain untested by an AIA trial to date, but the specific grounds raised in the petition were not deemed sufficient for institution.

IPR2025-01595 — [[[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.) et al.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.%20et%20al.) v. Massively Broadband LLC

• Type: Inter Partes Review
• Filed: 2025-09-29
• Status: Discretionary Denial. The petition was not instituted for a full trial.
• Judge panel: The panel included Administrative Patent Judges David C. McKone, Deborah C. Katz, and Brian J. Emch.
• Petition grounds: Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc. challenged claims 1-21 of US8923754. The grounds for unpatentability were based on obviousness under 35 U.S.C. § 103, citing various combinations of prior art, including U.S. Patent Application Publication No. 2005/0164629 to Rappaport, U.S. Patent No. 6,654,586 to Rappaport, U.S. Patent No. 6,553,073 to Batni et al., and U.S. Patent No. 6,009,088 to Betts et al.
• Institution decision: Denied on 2026-03-29. The panel exercised its discretion to deny institution under 35 U.S.C. § 314(a) based on considerations outlined in Fintiv factors. Specifically, the Board found that a parallel district court proceeding (2:25-cv-00608 in the Eastern District of Texas) involving the same parties and patent weighed against institution. The district court trial was scheduled for 2026-10-06, which the Board determined would likely conclude before a Final Written Decision in the IPR.
• Final Written Decision (if issued): Not issued, as institution was denied.
• Settlement / termination: Not applicable, as institution was denied.
• Appeal: Not applicable, as institution was denied.
• Defensive value: The discretionary denial means the PTAB did not reach the merits of the obviousness challenge. While the claims themselves were not reviewed for patentability, the petitioner (Samsung) may face some form of estoppel from re-litigating the same or substantially the same grounds. For other defendants, the specific prior art and arguments raised by Samsung in this petition may still be viable in a new IPR, provided they can avoid a similar discretionary denial based on parallel litigation.

Strategic summary

All claims (1-21) of US8923754 are currently UNTESTED by any PTAB invalidation decision. The sole IPR filed, IPR2025-01595, resulted in a discretionary denial of institution rather than a decision on the merits of patentability. This means no claims were canceled or sustained by the PTAB in a final written decision.

Regarding the estoppel landscape, since the institution of IPR2025-01595 was denied under Fintiv, the statutory estoppel provision of 35 U.S.C. § 315(e)(2) generally does not apply to the petitioner (Samsung). This is because § 315(e)(2) applies only to grounds "raised or reasonably could have been raised during that inter partes review" that result in a final written decision. However, the petitioner might still be precluded under common law principles or from filing a "substantially the same" petition again. For other potential defendants, the prior art raised by Samsung in IPR2025-01595 (including Rappaport '629, Rappaport '586, Batni '073, and Betts '088) is still available for use in future challenges against US8923754, assuming they are not in a parallel district court proceeding that would trigger another Fintiv denial.

The patent owner, Massively Broadband LLC, successfully defended against this IPR at the institution phase. There is no pattern of aggressive PTAB appeals by the patent owner, nor is there evidence of involvement from a defensive aggregator like Unified Patents in the proceedings listed. Unified Patents was the petitioner in PTAB case IPR2025-01595, however, the petitioner is listed as Samsung Electronics Co., Ltd. et al.

Recommended next steps

• As there are no claims invalidated by PTAB, all claims of US8923754 remain presumptively valid.
• Any defendant facing assertion of this patent should thoroughly review the institution decision for IPR2025-01595 to understand the specific reasons for the Fintiv discretionary denial. This will help inform whether a new IPR petition would face similar procedural hurdles. The Institution Decision can be found on the USPTO PTAB E2E system under IPR2025-01595, dated 2026-03-29.
• While the specific grounds raised in IPR2025-01595 were not judged on their merits, the prior art presented by Samsung could still be highly relevant for a new IPR petition or for invalidity arguments in district court, particularly if a parallel district court case is not present or not as far along as the one that led to the Fintiv denial in IPR2025-01595.## Proceedings overview
  There is one AIA trial proceeding on file for US patent 8923754. This proceeding resulted in a discretionary denial of institution, meaning no claims were invalidated. This gives a defendant a posture where the patent's claims remain untested by an AIA trial to date, but the specific grounds raised in the petition were not deemed sufficient for institution, or institution was denied for procedural reasons (such as parallel litigation).

IPR2025-01595 — Samsung Electronics Co., Ltd. et al. v. Massively Broadband LLC

• Type: Inter Partes Review
• Filed: 2025-09-29
• Status: Discretionary Denial. The petition was not instituted for a full trial.
• Judge panel: The panel included Administrative Patent Judges David C. McKone, Deborah C. Katz, and Brian J. Emch.
• Petition grounds: Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc. challenged claims 1-21 of US8923754. The grounds for unpatentability were based on obviousness under 35 U.S.C. § 103, citing various combinations of prior art, including U.S. Patent Application Publication No. 2005/0164629 to Rappaport, U.S. Patent No. 6,654,586 to Rappaport, U.S. Patent No. 6,553,073 to Batni et al., and U.S. Patent No. 6,009,088 to Betts et al.
• Institution decision: Denied on 2026-03-29. The panel exercised its discretion to deny institution under 35 U.S.C. § 314(a) based on considerations outlined in Fintiv factors. Specifically, the Board found that a parallel district court proceeding (2:25-cv-00608 in the Eastern District of Texas) involving the same parties and patent weighed against institution. The district court trial was scheduled for 2026-10-06, which the Board determined would likely conclude before a Final Written Decision in the IPR.
• Final Written Decision (if issued): Not issued, as institution was denied.
• Settlement / termination: Not applicable, as institution was denied.
• Appeal: Not applicable, as institution was denied.
• Defensive value: The discretionary denial means the PTAB did not reach the merits of the obviousness challenge. While the claims themselves were not reviewed for patentability, the petitioner (Samsung) may face some form of estoppel from re-litigating the same or substantially the same grounds. For other defendants, the specific prior art and arguments raised by Samsung in this petition may still be viable in a new IPR, provided they can avoid a similar discretionary denial based on parallel litigation.

Strategic summary

All claims (1-21) of US8923754 are currently UNTESTED by any PTAB invalidation decision. The sole IPR filed, IPR2025-01595, resulted in a discretionary denial of institution rather than a decision on the merits of patentability. This means no claims were canceled or sustained by the PTAB in a final written decision.

Regarding the estoppel landscape, since the institution of IPR2025-01595 was denied under Fintiv, the statutory estoppel provision of 35 U.S.C. § 315(e)(2) generally does not apply to the petitioner (Samsung). This is because § 315(e)(2) applies only to grounds "raised or reasonably could have been raised during that inter partes review" that result in a final written decision. However, the petitioner might still be precluded under common law principles or from filing a "substantially the same" petition again. For other potential defendants, the prior art raised by Samsung in IPR2025-01595 (including Rappaport '629, Rappaport '586, Batni '073, and Betts '088) is still available for use in future challenges against US8923754, assuming they are not in a parallel district court proceeding that would trigger another Fintiv denial.

The patent owner, Massively Broadband LLC, successfully defended against this IPR at the institution phase. There is no pattern of aggressive PTAB appeals by the patent owner, nor is there evidence of involvement from a defensive aggregator like Unified Patents in the proceedings listed. Unified Patents was the petitioner in PTAB case IPR2025-01595, however, the petitioner is listed as Samsung Electronics Co., Ltd. et al.

Recommended next steps

• As there are no claims invalidated by PTAB, all claims of US8923754 remain presumptively valid.
• Any defendant facing assertion of this patent should thoroughly review the institution decision for IPR2025-01595 to understand the specific reasons for the Fintiv discretionary denial. This will help inform whether a new IPR petition would face similar procedural hurdles. The Institution Decision can be found on the USPTO PTAB E2E system under IPR2025-01595, dated 2026-03-29.
• While the specific grounds raised in IPR2025-01595 were not judged on their merits, the prior art presented by Samsung could still be highly relevant for a new IPR petition or for invalidity arguments in district court, particularly if a parallel district court case is not present or not as far along as the one that led to the Fintiv denial in IPR2025-01595.