Patent 8549339

Litigation summary

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

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PTAB activity (1)

AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.

  • IPR2025-01532IPRfiled Sep 16, 2025vs. Apple Inc.Discretionary Denial

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Cases on file (5)

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Specific litigation cases in our database that name US patent 8549339. 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.

✓ Generated

Redstone Logics LLC Asserts Patent 8,549,339 in Multiple Lawsuits Against Tech Giants

As of April 26, 2026, US Patent 8,549,339, titled "Processor core communication in multi-core processor," is the subject of multiple patent infringement lawsuits filed by plaintiff Redstone Logics LLC against several major technology companies. The patent, which describes a method for managing communication between processor cores with independent supply voltages and clock signals, has been asserted in various district courts and has also faced challenges at the Patent Trial and Appeal Board (PTAB).

Here is a summary of the known litigation involving US Patent 8,549,339:

District Court Litigation:

Patent Trial and Appeal Board (PTAB) Proceedings:

In addition to the district court litigations, US Patent 8,549,339 has also been the subject of Inter Partes Review (IPR) petitions filed at the PTAB, seeking to invalidate the patent's claims.

These proceedings indicate a concerted effort by the accused infringers to challenge the validity of the '339 patent. The outcomes of these IPRs could significantly impact the ongoing district court litigations.

Generated 5/13/2026, 6:48:30 AM