Patent 9523826

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.

  • IPR2026-00093IPRfiled Nov 3, 2025vs. Accelight Technologies, Inc. et al.Discretionary Denial

Cached for 24 hours. Status strings are sourced verbatim from the PTAB API; the colored badge is our heuristic classification.

Cases on file (0)

Specific litigation cases in our database that name US patent 9523826. The free-form analysis below may also discuss cases beyond this list.

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Litigation summary

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

✓ Generated

US patent 9523826 is involved in the following known litigation:

  1. Applied Optoelectronics, Inc. v. Molex, LLC

    • Plaintiff(s): Applied Optoelectronics, Inc.
    • Defendant(s): Molex, LLC
    • Jurisdiction: U.S. District Court, Northern District of California
    • Case Number: 4:23-cv-04787 (also identified as 3:23-cv-04787 and 5:23-cv-04787 in other listings related to this patent)
    • Filing Date: September 18, 2023
    • Outcome/Current Status: The parties reached a settlement in principle, closing the case after approximately 200 days of litigation. US9523826 was one of six patents asserted in this action.

  2. Applied Optoelectronics Inc v. Cambridge Industries Incorporated

    • Plaintiff(s): Applied Optoelectronics Inc
    • Defendant(s): Cambridge Industries Incorporated
    • Jurisdiction: U.S. District Court, Northern District of California
    • Case Number: 5:24-cv-01010 (also identified as 3:24-cv-01010 in other listings related to this patent)
    • Filing Date: February 20, 2024
    • Outcome/Current Status: The case is ongoing and alleges infringement of US9523826 and other patents.

  3. Cambridge Industries USA, Inc. v. Applied Optoelectronics, Inc.

    • Plaintiff(s) (Petitioner): Cambridge Industries USA, Inc.
    • Defendant(s) (Patent Owner): Applied Optoelectronics, Inc.
    • Jurisdiction: Patent Trial and Appeal Board (PTAB)
    • Case Number: IPR2025-00433
    • Filing Date: The exact filing date of the petition is not explicitly stated in the search results, but the Director's decision denying institution was issued on June 26, 2025.
    • Outcome/Current Status: Not Instituted - Procedural. The PTAB denied institution of the Inter Partes Review (IPR) on June 26, 2025, based on the "settled expectations" doctrine because the patent had been in force for seven years. Cambridge Industries subsequently filed a petition for a writ of mandamus in the Federal Circuit on October 10, 2025, challenging this denial.

  4. Cambridge Industries (Petitioner) v. Director of the USPTO (Respondent)

    • Plaintiff(s) (Petitioner): Cambridge Industries
    • Defendant(s) (Respondent): Director of the USPTO (implicitly, as it is a petition for mandamus)
    • Jurisdiction: Court of Appeals for the Federal Circuit (CAFC)
    • Case Number: 26-101
    • Filing Date: October 10, 2025
    • Outcome/Current Status: This is a petition for a writ of mandamus filed by Cambridge Industries, asking the court to reconsider the denial of institution for IPR2025-00433.

  5. PTAB Case (IPR2026-00093)

    • Jurisdiction: Patent Trial and Appeal Board (PTAB)
    • Case Number: IPR2026-00093
    • Filing Date: Not readily available from the provided search results.
    • Outcome/Current Status: Not Instituted - Procedural. Details regarding the petitioner, patent owner, and specific reasons for denial were not found in the search results.

  6. U.S. District Court, Northern District of California (Case Numbers 4:24-cv-09041 and 3:24-cv-09041)

    • Details regarding the plaintiff(s), defendant(s), filing date, or current status for these specific case numbers were not readily available from the conducted searches.

Generated 5/26/2026, 6:45:59 AM