Patent 6628629

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 (3)

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Specific litigation cases in our database that name US patent 6628629. 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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Patent Litigation Search: US Patent No. 6,628,629

A search for litigation involving U.S. Patent No. 6,628,629 reveals that this patent has been asserted in multiple lawsuits, primarily by INVT SPE LLC, an affiliate of Fortress Investment Group. The patent, titled "Reservation based prioritization method for wireless transmission of latency and jitter sensitive IP-flows in a wireless point to multi-point transmission system," has been used in infringement cases against several major technology companies.

Below is a list of known litigation involving this patent, including details on the parties, jurisdiction, case number, filing date, and the status or outcome of the proceedings.

1. INVT SPE LLC v. T-Mobile USA, Inc.

  • Plaintiff: INVT SPE LLC
  • Defendant: T-Mobile USA, Inc.
  • Jurisdiction: U.S. District Court for the Western District of Texas
  • Case Number: 6:21-cv-00624
  • Filing Date: June 15, 2021
  • Status/Outcome: This case is part of a broader campaign by INVT SPE LLC. On June 23, 2023, the Patent Trial and Appeal Board (PTAB) instituted a post-grant review (PGR) of certain claims of the patent, which could impact this litigation. The case is currently stayed pending the outcome of the PGR.

2. INVT SPE LLC v. Verizon Communications, Inc. et al.

  • Plaintiff: INVT SPE LLC
  • Defendant: Verizon Communications, Inc., Verizon Wireless Services, LLC, Cellco Partnership
  • Jurisdiction: U.S. District Court for the Western District of Texas
  • Case Number: 6:21-cv-00623
  • Filing Date: June 15, 2021
  • Status/Outcome: This case is also part of INVT SPE LLC's litigation campaign. Similar to the T-Mobile case, this litigation is likely impacted by the ongoing post-grant review of the patent. The case is currently stayed.

3. INVT SPE LLC v. AT&T Inc. et al.

  • Plaintiff: INVT SPE LLC
  • Defendant: AT&T Inc., AT&T Mobility LLC
  • Jurisdiction: U.S. District Court for the Western District of Texas
  • Case Number: 6:21-cv-00622
  • Filing Date: June 15, 2021
  • Status/Outcome: This case is another component of the same litigation campaign. The case is currently stayed pending the outcome of the post-grant review (PGR) proceeding initiated by a petition from Apple Inc.

Inter Partes Review (IPR) and Post-Grant Review (PGR) Proceedings:

It is important to note that U.S. Patent No. 6,628,629 has also been the subject of challenges at the Patent Trial and Appeal Board (PTAB).

  • IPR2018-00727: This Inter Partes Review was filed, and a final written decision was issued.
  • PGR2022-00051: Apple Inc. filed a petition for Post-Grant Review against this patent. The PTAB instituted the trial on June 23, 2023. The institution of this review has led to stays in the district court litigations.

This information is based on publicly available litigation data and should not be considered a complete or exhaustive list. The legal status of patents and related litigation can change frequently.

Generated 5/12/2026, 12:48:24 AM