Patent 8993384

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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PTAB activity (1)

AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.

1 active
  • IPR2025-01265IPRfiled Jul 8, 2025vs. Taiwan Semiconductor Manufacturing Company LimitedTrial Instituted

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Cases on file (4)

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Specific litigation cases in our database that name US patent 8993384. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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Litigation involving US Patent 8993384:

Inter Partes Review (IPR) before the Patent Trial and Appeal Board (PTAB)

  • Case Number: IPR2025-01265 [cite: The full patent text states: "PTAB case IPR2025-01265 filed (Pending - Instituted) litigation https://portal.unifiedpatents.com/ptab/case/IPR2025-01265 Petitioner: "Unified Patents PTAB Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License."]
    • Plaintiff(s): Unified Patents (Petitioner) [cite: The full patent text states: "PTAB case IPR2025-01265 filed (Pending - Instituted) litigation https://portal.unifiedpatents.com/ptab/case/IPR2025-01265 Petitioner: "Unified Patents PTAB Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License."]
    • Defendant(s): [Marlin Semiconductor Ltd.](/litigations/by-defendant/Marlin%20Semiconductor%20Ltd.) (Patent Owner) (Assumed, as Marlin Semiconductor is the current assignee and typically defends IPRs)
    • Jurisdiction: Patent Trial and Appeal Board (PTAB) of the USPTO [cite: The full patent text states: "PTAB case IPR2025-01265 filed (Pending - Instituted) litigation https://portal.unifiedpatents.com/ptab/case/IPR2025-01265 Petitioner: "Unified Patents PTAB Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License."]
    • Filing Date: The IPR was filed. (Specific date not provided, but the case number indicates it was filed in 2025). [cite: The full patent text states: "PTAB case IPR2025-01265 filed (Pending - Instituted) litigation https://portal.unifiedpatents.com/ptab/case/IPR2025-01265 Petitioner: "Unified Patents PTAB Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License."]
    • Outcome/Current Status: Pending - Instituted [cite: The full patent text states: "PTAB case IPR2025-01265 filed (Pending - Instituted) litigation https://portal.unifiedpatents.com/ptab/case/IPR2025-01265 Petitioner: "Unified Patents PTAB Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License."]

District Court Litigation

It appears US8993384 is part of a portfolio of patents previously owned by United Microelectronics Corporation (UMC) and now being asserted by Marlin Semiconductor Limited (f/k/a Sandyford Semiconductor Limited), a subsidiary of IPValue Management.

  • Case Number: 1:25-cv-00215

    • Plaintiff(s): Marlin Semiconductor Limited and Longitude Licensing Limited
    • Defendant(s): Apple, Broadcom, and Qualcomm
    • Jurisdiction: Western District of Texas
    • Filing Date: On or before February 16, 2025 (litigation initiated).
    • Outcome/Current Status: Ongoing. The asserted patents, including US8993384, are broadly directed to various aspects of semiconductor fabrication.

  • Case Number: 2:25-cv-00171

    • Plaintiff(s): Marlin Semiconductor Limited and Longitude Licensing Limited
    • Defendant(s): Lenovo (Motorola Mobile Communication), OnePlus, and TSMC
    • Jurisdiction: Eastern District of Texas
    • Filing Date: On or before February 16, 2025 (litigation initiated).
    • Outcome/Current Status: Ongoing. The asserted patents, including US8993384, are broadly directed to various aspects of semiconductor fabrication. An evidentiary hearing in related ITC investigation (337-TA-1443) is scheduled for February 2, 2026.

International Trade Commission (ITC)

  • Case Number: 337-TA-1443
    • Plaintiff(s): Marlin Semiconductor and Longitude Licensing (Complainants)
    • Defendant(s): TSMC, Apple, Broadcom, Qualcomm, Lenovo, Motorola, and OnePlus (Respondents)
    • Jurisdiction: U.S. International Trade Commission (ITC)
    • Filing Date: (Not explicitly stated, but the investigation was instituted in March 2019 for a different case involving AMD and graphics processing technology, and cases were simultaneously filed in U.S. District Court and internationally in Germany and China in that context. The current case involving Marlin Semiconductor and Longitude Licensing has an evidentiary hearing scheduled for February 2, 2026.)
    • Outcome/Current Status: Ongoing. An evidentiary hearing is scheduled for February 2, 2026. The asserted patents, acquired by Marlin from UMC, are directed toward semiconductor devices and manufacturing technology.

Generated 5/19/2026, 12:46:47 PM