Patent 7224678

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 7224678. 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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Known litigation involving US patent 7224678 includes a number of district court cases and an ex parte reexamination proceeding at the USPTO.

USPTO Ex Parte Reexamination

  • Patent Owner: Stingray IP Solutions LLC (an entity of Acacia Research Corporation)
  • Challenger: Unified Patents
  • Case Number: IPR2019-01631 (This was a PTAB case that was settled, according to Google Patents. However, recent search results indicate an ex parte reexamination which is a different type of proceeding.)
  • Filing Date: While the original IPR2019-01631 was filed earlier, recent updates refer to an ex parte reexamination.
  • Current Status/Outcome: On May 20, 2026, the Central Reexamination Unit (CRU) entered a notice of intent to issue a reexamination certificate canceling all challenged claims of U.S. Patent 7,224,678. The Examiner maintained the rejections of all challenged claims. An earlier advisory action on February 5, 2026, also maintained the rejections of all challenged claims.
  • Related Parties: The patent was asserted against Leedarson IoT, Schlage Lock, Hewlett Packard Enterprise, Vivint, and Allegion in various district court litigations.

District Court Litigations

The Google Patents page for US7224678B2 indicates a history of litigation in the following jurisdictions, primarily with Stingray IP Solutions LLC as the current assignee. While specific plaintiff/defendant details, case numbers, filing dates, and outcomes for all cases are not explicitly listed in the search results, the following are mentioned:

  • Jurisdiction: Texas Eastern District Court
    • Multiple cases filed, including:
      • Case: 2:22-cv-00420
      • Case: 2:22-cv-00421
      • Case: 2:24-cv-00868
      • Case: 2:24-cv-00396
      • Case: 2:24-cv-00159
      • Case: 2:23-cv-00503
      • Case: 2:23-cv-00499
      • Case: 2:23-cv-00003
      • Case: 2:22-cv-00389
      • Case: 2:21-cv-00202
      • Case: 2:21-cv-00196
      • Case: 2:21-cv-00046
      • Case: 2:21-cv-00044
      • Case: 2:21-cv-00027
      • Case: 2:18-cv-00439
  • Jurisdiction: New Jersey District Court
    • Case: 3:21-cv-11989
  • Jurisdiction: California Central District Court
    • Case: 2:22-cv-07571
    • Case: 2:24-cv-10162

The patent's Google Patents page indicates its legal status as "Expired - Lifetime" with an expiration date of 2024-05-20. The ongoing reexamination and recent district court filings suggest that litigation related to the patent was active up to or around its expiration, or concerns past alleged infringements.

Generated 5/29/2026, 7:33:17 PM