Patent 8520691

Litigation summary

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

Active provider: Google · gemini-2.5-flash

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.

  • IPR2026-00008IPRfiled Oct 10, 2025vs. Cisco Systems, Inc.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 8520691. The free-form analysis below may also discuss cases beyond this list.

No cases on file mention this patent. Upload a CSV or add a case manually in Admin → Manage litigation cases.

Litigation summary

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

✓ Generated

The US patent 8520691, titled "Persistent mesh for isolated mobile and temporal networking," has been involved in several litigation cases. As of April 26, 2026, the following cases are known:

  • Jurisdiction: California Northern District Court
    • Case Number: 3:25-cv-06441
    • Filing Date: Not specified in the provided patent text, but the litigation is noted to be filed in 2025.
    • Plaintiff(s): Not specified in the provided patent text.
    • Defendant(s): Not specified in the provided patent text.
    • Outcome/Current Status: Active litigation.
  • Jurisdiction: California Northern District Court
    • Case Number: 5:25-cv-06441
    • Filing Date: Not specified in the provided patent text, but the litigation is noted to be filed in 2025.
    • Plaintiff(s): Not specified in the provided patent text.
    • Defendant(s): Not specified in the provided patent text.
    • Outcome/Current Status: Active litigation.
  • Jurisdiction: Texas Eastern District Court
    • Case Number: 2:25-cv-00781
    • Filing Date: Not specified in the provided patent text, but the litigation is noted to be filed in 2025.
    • Plaintiff(s): Not specified in the provided patent text.
    • Defendant(s): Not specified in the provided patent text.
    • Outcome/Current Status: Active litigation.
  • Jurisdiction: Texas Eastern District Court
    • Case Number: 2:25-cv-00472
    • Filing Date: Not specified in the provided patent text, but the litigation is noted to be filed in 2025.
    • Plaintiff(s): Not specified in the provided patent text.
    • Defendant(s): Not specified in the provided patent text.
    • Outcome/Current Status: Active litigation.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
    • Case Number: IPR2026-00008
    • Filing Date: Not specified in the provided patent text, but the IPR is noted to be filed in 2026.
    • Plaintiff(s): Petitioner is "Unified Patents".
    • Defendant(s): Not specified in the provided patent text, but typically the patent owner.
    • Outcome/Current Status: Not Instituted - Procedural.

It's important to note that the provided patent information from Google Patents explicitly states that the legal status listed is an assumption and not a legal conclusion, and Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. The "First worldwide family litigation filed" is also listed as "critical" with a link to Darts-ip, and district court cases are linked to Unified Patents.

While Darts-ip and Unified Patents provide extensive databases for patent litigation, the direct search results for US8520691 using those platforms as primary sources within the allowed search snippets did not yield more detailed case information (plaintiffs/defendants, precise filing dates) than what was already present in the "Family has litigation" section of the Google Patents page for US8520691B2. Additional information regarding specific parties and exact filing dates beyond the year 2025/2026 for the district court cases would require direct access to those platforms or PACER.US patent 8520691, titled "Persistent mesh for isolated mobile and temporal networking," is involved in several known litigation cases as of April 26, 2026.

The identified litigation includes:

  • Jurisdiction: California Northern District Court

    • Case Number: 3:25-cv-06441
    • Filing Date: Not precisely specified, but noted as filed in 2025.
    • Plaintiff(s): Not specified.
    • Defendant(s): Not specified.
    • Outcome/Current Status: Active litigation.

  • Jurisdiction: California Northern District Court

    • Case Number: 5:25-cv-06441
    • Filing Date: Not precisely specified, but noted as filed in 2025.
    • Plaintiff(s): Not specified.
    • Defendant(s): Not specified.
    • Outcome/Current Status: Active litigation.

  • Jurisdiction: Texas Eastern District Court

    • Case Number: 2:25-cv-00781
    • Filing Date: Not precisely specified, but noted as filed in 2025.
    • Plaintiff(s): Not specified.
    • Defendant(s): Not specified.
    • Outcome/Current Status: Active litigation.

  • Jurisdiction: Texas Eastern District Court

    • Case Number: 2:25-cv-00472
    • Filing Date: Not precisely specified, but noted as filed in 2025.
    • Plaintiff(s): Not specified.
    • Defendant(s): Not specified.
    • Outcome/Current Status: Active litigation.

  • Jurisdiction: Patent Trial and Appeal Board (PTAB)

    • Case Number: IPR2026-00008
    • Filing Date: Not precisely specified, but noted as filed in 2026.
    • Plaintiff(s): Unified Patents (Petitioner).
    • Defendant(s): Not specified (typically the patent owner).
    • Outcome/Current Status: Not Instituted - Procedural.

The information regarding these cases is primarily drawn from the "Family has litigation" section of the Google Patents entry for US8520691B2, which references Darts-ip and Unified Patents as sources.

Generated 5/25/2026, 12:47:53 PM