PTAB challenges

Proceedings overview

There are two active PTAB proceedings on file for US9510040B2. Both IPR2024-00351 and IPR2024-00694 were filed by LG Electronics Inc., LG Electronics USA Inc., and Vizio Inc. against Multimedia Technologies Pte Ltd., and both are currently awaiting a Final Written Decision. An appeal for both IPRs was filed at the Federal Circuit (Case No. 25-2063) by Multimedia Technologies Pte. Ltd., but was voluntarily dismissed on January 9, 2026. This indicates that while the patent owner initially sought to challenge the PTAB's decisions, a settlement or other agreement was reached, leaving the IPRs to proceed to their FWDs without the distraction of an appeal. For a defendant, this means the patent is currently undergoing challenges to its claims, and the outcome of the FWDs will significantly impact the defensive posture.

IPR2024-00351 — LG Electronics Inc., LG Electronics USA Inc., and Vizio Inc. v. Multimedia Technologies Pte Ltd.

• Type: Inter Partes Review
• Filed: 2023-12-20
• Status: Final Written Decision (awaiting issuance)
• Judge panel: Not publicly available yet.
• Petition grounds: The specific claims and prior art challenged are not explicitly detailed in the public records available, but the petition was filed under 35 U.S.C. §§ 102 or 103 on the basis of prior art patents or printed publications.
• Institution decision: Instituted (date not explicitly stated, but it is clear from the "Final Written Decision" status that it was instituted). The panel's reasoning is not publicly available yet.
• Final Written Decision (if issued): Not yet issued, but expected.
• Settlement / termination: An appeal of this proceeding, along with IPR2024-00694, was voluntarily dismissed by the Federal Circuit on January 9, 2026, due to an agreement between the parties. The specific terms of the settlement are confidential.
• Appeal: An appeal was filed by Multimedia Technologies Pte. Ltd. with the United States Court of Appeals for the Federal Circuit (Case No. 25-2063) on August 29, 2025. The appeal was voluntarily dismissed by mutual agreement on January 9, 2026.
• Defensive value: This IPR is actively challenging claims of US9510040. While the institution decision's reasoning is not yet public, the fact that an appeal was filed and then dismissed suggests the patent owner recognized the strength of the petitioner's arguments or reached a settlement. The upcoming Final Written Decision will be crucial in determining which claims, if any, remain patentable.

IPR2024-00694 — LG Electronics Inc., LG Electronics USA Inc., and Vizio Inc. v. Multimedia Technologies Pte Ltd.

• Type: Inter Partes Review
• Filed: 2024-03-14
• Status: Final Written Decision (awaiting issuance)
• Judge panel: Not publicly available yet.
• Petition grounds: The specific claims and prior art challenged are not explicitly detailed in the public records available. It was filed under 35 U.S.C. §§ 102 or 103 on the basis of prior art patents or printed publications.
• Institution decision: Instituted (date not explicitly stated, but it is clear from the "Final Written Decision" status that it was instituted). The panel's reasoning is not publicly available yet.
• Final Written Decision (if issued): Not yet issued, but expected.
• Settlement / termination: An appeal of this proceeding, along with IPR2024-00351, was voluntarily dismissed by the Federal Circuit on January 9, 2026, due to an agreement between the parties. The specific terms of the settlement are confidential.
• Appeal: An appeal was filed by Multimedia Technologies Pte. Ltd. with the United States Court of Appeals for the Federal Circuit (Case No. 25-2063) on August 29, 2025. The appeal was voluntarily dismissed by mutual agreement on January 9, 2026.
• Defensive value: Similar to IPR2024-00351, this IPR is actively challenging claims of US9510040. The voluntary dismissal of the appeal indicates a potential settlement or acknowledgment of the IPR's strength. The forthcoming Final Written Decision will determine the patentability of the challenged claims.

Strategic summary

Currently, the patent US9510040B2 has two active Inter Partes Review proceedings, IPR2024-00351 and IPR2024-00694, filed by LG Electronics Inc., LG Electronics USA Inc., and Vizio Inc. against the patent owner Multimedia Technologies Pte Ltd. Both IPRs are in the "Final Written Decision" status, meaning they have been instituted and are awaiting the Board's final determination on the patentability of the challenged claims. All claims of US9510040 are currently under review in these proceedings, and thus the status of which claims are CANCELED vs. SUSTAINED vs. UNTESTED is unknown until the FWDs are issued.

The estoppel landscape under 35 U.S.C. § 315(e)(2) will apply to the petitioners (LG Electronics Inc., LG Electronics USA Inc., and Vizio Inc.) and their privies once the Final Written Decisions are issued. This will bar them from raising any ground they raised or reasonably could have raised in these instituted IPRs. Given that the petitioners have made a "Sotera stipulation," they have agreed not to pursue in district court litigation any grounds that were raised or could have reasonably been raised under §§ 102 or 103 on the basis of prior art patents or printed publications in the instituted IPR proceedings. This suggests a strategic move to focus the invalidity arguments within the PTAB.

A notable pattern signal is that LG Electronics Inc. and Vizio Inc. are named as petitioners in both IPRs, indicating a concerted effort to challenge the patent. Furthermore, the patent owner, Multimedia Technologies Pte. Ltd., initially appealed the PTAB proceedings to the Federal Circuit (Case No. 25-2063), but then voluntarily dismissed the appeal. This could signal a settlement between the parties or a strategic decision by the patent owner not to pursue the appeal, perhaps due to the strength of the petitioner's arguments or a broader licensing agreement.

Recommended next steps

The most critical upcoming milestones are the issuance of the Final Written Decisions for IPR2024-00351 and IPR2024-00694. A defendant should closely monitor the PTAB-E2E system for these decisions. Once issued, the FWDs will explicitly state which claims, if any, have been found unpatentable.

If you are a defendant facing assertion of US9510040B2 today, your next steps should be:

• Obtain and review the institution decisions for both IPR2024-00351 and IPR2024-00694. While not explicitly provided here, these documents will detail the specific claims challenged and the prior art cited, giving you insight into the strength of the invalidity arguments.
• Anticipate the Final Written Decisions. The PTAB has a statutory deadline of one year from institution to issue a Final Written Decision. Given the filing dates of December 20, 2023, and March 14, 2024, the FWDs could be issued around December 2024 and March 2025, respectively. You should prepare to analyze these decisions immediately upon their release.
• Assess the impact of the FWDs on any asserted claims. If claims cited in a demand letter are canceled, it significantly weakens the patent owner's position. Conversely, if claims are sustained, it indicates the Board found them patentable over the presented art.
• Consider the estoppel implications. The "Sotera stipulations" made by the petitioners mean that some prior art grounds will be unavailable to them in co-pending or future district court litigation if the IPRs are instituted and result in a FWD.
• Investigate the nature of the Federal Circuit appeal dismissal (Case No. 25-2063). While the terms of the settlement are confidential, the dismissal suggests a resolution between the parties involved in those specific IPRs. Understanding the context of this dismissal could provide further strategic insights. The dismissal order can be found at: https://www.courtlistener.com/docket/[68641473](/patent/68641473)/multimedia-technologies-pte-ltd-v-lg-electronics-inc/.