Patent 10578818

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
  • IPR2026-00094IPRfiled Nov 5, 2025vs. Eoptolink Technology USA Inc. et al.Trial Instituted

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

Cases on file (2)

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Specific litigation cases in our database that name US patent 10578818. 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.

✓ Generated

US patent 10578818 is involved in the following known litigation:

  1. PTAB Case IPR2026-00094

    • Plaintiff(s): Eoptolink Technology USA Inc. (Implied from related district court filings where Eoptolink filed IPR petitions against AOI's patents, including this one.)
    • Defendant(s): Applied Optoelectronics, Inc. (Owner of US10578818)
    • Jurisdiction: Patent Trial and Appeal Board (PTAB)
    • Case Number: IPR2026-00094
    • Filing Date: The Google Patents page indicates "IPR2026-00094 filed (Pending - Instituted)", but the precise filing date is not directly available in the provided snippets. However, it is referenced in a motion filed November 19, 2024, as having been filed "Beginning in October 2025" in relation to other IPRs. Given the IPR number IPR2026-00094, it's plausible it was filed in late 2025.
    • Outcome/Current Status: Pending - Instituted

  2. US District Court Case

    • Plaintiff(s): Applied Optoelectronics, Inc.
    • Defendant(s): Eoptolink Technology USA Inc.
    • Jurisdiction: California Northern District Court
    • Case Number: 3:24-cv-08165
    • Filing Date: November 19, 2024
    • Outcome/Current Status: Applied Optoelectronics, Inc. filed a patent infringement lawsuit against Eoptolink Technology USA Inc., alleging infringement of several optical transceiver patents, including US10578818. Eoptolink subsequently filed IPR petitions challenging the patentability of asserted claims of four patents in this action, and plans to file requests for ex parte reexamination against the remaining two patents. A joint administrative motion to stay the district court case pending the PTAB decisions was filed.

  3. US District Court Case

    • Plaintiff(s): Applied Optoelectronics, Inc.
    • Defendant(s): Eoptolink Technology USA Inc.
    • Jurisdiction: California Northern District Court
    • Case Number: 5:24-cv-08165-NW (Note: The Google Patents page listed "5:24-cv-08165", but search results provide the full case number including the judge's initials "-NW").
    • Filing Date: November 19, 2024
    • Outcome/Current Status: This appears to be the same underlying litigation as case 2, with "5:24-cv-08165-NW" being the more complete case number (which is common practice in federal courts to include judge's initials). The status is active, with discussions around staying the case pending IPR outcomes.

Generated 5/26/2026, 6:48:01 AM