Patent 9667751

Litigation summary

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

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No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.

Cases on file (2)

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Specific litigation cases in our database that name US patent 9667751. 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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US Patent 9667751, titled "Data feed acceleration," has been involved in several litigation cases.

Here is a list of known litigation involving US Patent 9667751:

  • Realtime Data LLC v. Array Networks Inc.

    • Plaintiff(s): Realtime Data LLC
    • Defendant(s): Array Networks Inc., Fortinet, Reduxio, Panzura, Aryaka
    • Jurisdiction: U.S. Court of Appeals for the Federal Circuit (initially District of Delaware)
    • Case Number: 21-2251 (Federal Circuit)
    • Filing Date: Realtime filed suit against Fortinet and Reduxio in November 2017, against Panzura in August 2018, and against Aryaka in December 2018.
    • Outcome/Status: The Federal Circuit vacated and remanded an earlier district court ruling that had dismissed five patents, including the '751 patent, for lack of subject matter eligibility under 35 U.S.C. § 101. Following remand, the district court again found the patents invalid for claiming patent-ineligible subject matter in a May 4, 2021 written opinion. The district court's decision was based on the finding that the patents were directed to an abstract idea and that the technologies and methods used were well-known and routine.

  • Various cases filed in Delaware District Court: There are numerous entries indicating litigation filed in the Delaware District Court concerning the patent family of US9667751B2. These include cases such as:

    • 1:18-cv-01200
    • 1:18-cv-01621
    • 1:17-cv-00925
    • 1:17-cv-01543
    • 1:17-cv-01544
    • 1:17-cv-01635
    • 1:17-cv-01676
    • 1:17-cv-01750
    • 1:17-cv-01769
    • 1:18-cv-00653
    • 1:18-cv-01163
    • 1:18-cv-01164
    • 1:18-cv-01197
    • 1:20-cv-01498
    • 1:18-cv-01201
    • 1:18-cv-01198
    • 1:18-cv-01199
    • 1:18-cv-01202
    • 1:18-cv-01267
    • 1:18-cv-01491
    • 1:18-cv-01540
    • 1:18-cv-01544
    • 1:18-cv-01566
    • 1:20-cv-01497
    • 1:18-cv-01964
    • 1:18-cv-01995
    • 1:18-cv-02017
    • 1:18-cv-02062
    • 1:19-cv-00031
    • 1:19-cv-00279
    • 1:19-cv-00357
    • 1:19-cv-00394
    • 1:19-cv-00395
    • 1:19-cv-00492

  • PTAB case IPR2018-00549:

    • Outcome/Status: Settlement

  • US case filed in U.S. Supreme Court:

    • Case Number: 23-498

  • Various cases filed in Texas Eastern District Court:

    • 6:18-cv-00283
    • 6:18-cv-00182

  • US case filed in Massachusetts District Court:

    • 1:18-cv-12188

  • Various cases filed in California Central District Court:

    • 2:17-cv-07690
    • 2:19-cv-06160

  • Various cases filed in California Northern District Court:

    • 3:18-cv-00574
    • 3:19-cv-01504

  • US case filed in Colorado District Court:

    • 1:17-cv-02479

  • Various cases filed in Court of Appeals for the Federal Circuit:

    • 19-2198
    • 19-2201
    • 19-2202
    • 19-2204
    • 21-2251
    • 21-2291

Please note that for many of the listed cases from Unified Patents, the specific plaintiffs, defendants, and detailed outcomes are not immediately available without further investigation into each individual case entry. The provided information largely reflects the existence of litigation related to US9667751B2 in the specified jurisdictions.

Generated 5/29/2026, 8:57:03 PM