Patent 6958986

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 (7)

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Specific litigation cases in our database that name US patent 6958986. 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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The patent US6958986B2, titled "Wireless communication system with enhanced time slot allocation and interference avoidance/mitigation features and related methods," has been involved in multiple litigation cases. The patent expired on January 25, 2023.

Based on the provided patent information and search results, the following litigation involving US patent 6958986 is known:

  • Case 1:

  • Case 2:

    • Plaintiff(s): Stingray IP Solutions LLC
    • Defendant(s): TP-Link Corporation Ltd., TP-Link USA Corp., TP Link Technologies Co Ltd.
    • Jurisdiction: California Central District Court (transferred from Texas Eastern District Court)
    • Case Number: 2:22-cv-07541 (originally 2:21-cv-00045-JRG in E.D. Tex.)
    • Filing Date: 2021-02-08 (for the original E.D. Tex. case)
    • Outcome or Current Status: Closed. The Federal Circuit granted a mandamus petition on January 9, 2023, vacating the district court's transfer order and instructing the court to recall the cases to the Eastern District of Texas.

  • Case 3:

    • Plaintiff(s): Stingray IP Solutions LLC
    • Defendant(s): Somfy Activits SA, Somfy SA
    • Jurisdiction: Texas Eastern District Court
    • Case Number: 2:21-cv-00195
    • Filing Date: 2021-06-01
    • Outcome or Current Status: Closed

  • Case 4:

  • Case 5:

  • Case 6:

    • Plaintiff(s): Stingray IP Solutions LLC
    • Defendant(s): Assa Abloy IP AB
    • Jurisdiction: Texas Eastern District Court
    • Case Number: 2:21-cv-00025
    • Filing Date: Not explicitly stated in the provided snippets for this specific case, but other 2:21-cv-000XX cases from Stingray were filed in Feb 2021.
    • Outcome or Current Status: Closed

  • Case 7:

    • Plaintiff(s): Stingray IP Solutions LLC
    • Defendant(s): TP-Link Corporation Ltd., TP-Link USA Corp., TP Link Technologies Co Ltd. (This appears to be related to or the same as the 2:21-cv-00045 case that was transferred and recalled by CAFC). The patent record lists 2:21-cv-00045 separately from 2:22-cv-07541 which implies they are distinct filings or that 2:21-cv-00045 was the initial filing that later led to the CAFC mandamus for transfer. Given the search results, 2:21-cv-00045 is directly tied to the CAFC mandamus.
    • Jurisdiction: Texas Eastern District Court (and Federal Circuit for mandamus)
    • Case Number: 2:21-cv-00045
    • Filing Date: 2021-02-08
    • Outcome or Current Status: Closed. The Federal Circuit vacated district court orders transferring two patent cases (including 2:21-cv-00045) to the Central District of California and instructed the court to recall the cases.

  • Case 8:

    • Plaintiff(s): Stingray IP Solutions LLC
    • Defendant(s): Not specifically listed in the snippet, but the pattern suggests other entities from the "Texas Eastern District Court" cases.
    • Jurisdiction: Texas Eastern District Court
    • Case Number: 2:18-cv-00439
    • Filing Date: Not provided in snippets.
    • Outcome or Current Status: The patent text lists this case, but Unified Patents' search result snippets do not provide specific details for this case number directly, and it's not explicitly marked as "Closed" in the available snippets like others. The initial patent listing indicates "litigation" generally.

  • Case 9:

    • Plaintiff(s): Stingray IP Solutions LLC
    • Defendant(s): Not specifically listed in the snippet.
    • Jurisdiction: New Jersey District Court
    • Case Number: 3:21-cv-11989
    • Filing Date: Not provided in snippets.
    • Outcome or Current Status: The patent text lists this case, but Unified Patents' search result snippets do not provide specific details for this case number directly.

The "First worldwide family litigation filed" link to Darts-ip (https://patents.darts-ip.com/?family=[33309445](/patent/33309445)&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=[US6958986](/patent/US6958986)(B2)) provides a general overview for the patent family, but detailed case-by-case information (like plaintiff, defendant, filing date, and status for each specific case globally) requires direct interaction with the Darts-ip platform, which is beyond the scope of a direct search result snippet. However, the Unified Patents portal has provided sufficient information for the US cases listed in the patent.

It is important to note that all the identified US district court cases initiated by Stingray IP Solutions LLC related to US6958986 are marked as "Closed" in the Unified Patents database. The patent itself expired on January 25, 2023.

Generated 5/29/2026, 6:01:59 PM