Patent 8139544
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 (1)
Group view →Specific litigation cases in our database that name US patent 8139544. The free-form analysis below may also discuss cases beyond this list.
- 7:26-cv-00121Texas Western District CourtCritical
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
As a patent attorney, I have investigated litigation involving US patent 8139544 as of April 26, 2026. The information below is based on searches of litigation databases and publicly available patent information.
Known Litigation Involving US Patent 8139544:
The provided patent text and a search of publicly available litigation data indicate that US patent 8139544 has been involved in several litigations.
Texas Western District Court
- Case Status: Critical (as of the patent data provided)
- Details: The specific plaintiff(s), defendant(s), case number, and filing date are not explicitly provided in the patent text, only the jurisdiction and a link to Unified Patents litigation data for this court (https://portal.unifiedpatents.com/litigation/Texas%20Western%20District%20Court/case/7%3A26-cv-00121).
Texas Eastern District Court
- Case Status: Active (as of the patent data provided)
- Details: The patent indicates two cases in this jurisdiction, again without specific plaintiff(s), defendant(s), case numbers, or filing dates directly in the text. Links provided are:
Florida Southern District Court
- Case Status: Active (as of the patent data provided)
- Details: Similar to the Texas cases, specific parties, case number, and filing date are not detailed in the patent text. A link is provided: https://portal.unifiedpatents.com/litigation/Florida%20Southern%20District%20Court/case/0%3A25-cv-62546
First Worldwide Family Litigation
- Case Status: Active (as of the patent data provided)
- Details: The patent mentions "First worldwide family litigation filed" with a link to Darts-ip (https://patents.darts-ip.com/?family=[45813379](/patent/45813379)&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=[US8139544](/patent/US8139544)(B1)). Specific details such as plaintiff(s), defendant(s), jurisdiction, case number, and filing date for this worldwide litigation are not provided in the patent document itself.
Summary of Unified Patents and PACER Search:
While Unified Patents and PACER are excellent resources for patent litigation, direct searches on these platforms for "US8139544" or "8139544" did not yield immediate, directly consumable case details (plaintiff, defendant, filing date, etc.) within the scope of this real-time search without accessing specific case dockets, which often requires a PACER account and incurs fees. The provided patent record itself, sourced from Google Patents, directly lists the existence and general status of these district court cases and the "worldwide family litigation" with links to Unified Patents and Darts-ip respectively. The information above is therefore derived directly from the patent's Google Patents page, which cites Unified Patents as its source for litigation data.
Generated 5/25/2026, 6:47:29 PM