Redstone Logics LLC v. Advanced Micro Devices, Inc.

Redstone Logics LLC, identified as a non-practicing entity (NPE) or patent assertion entity (PAE), initiated this patent infringement lawsuit against Advanced Micro Devices, Inc. (AMD), a prominent operating company in the semiconductor industry. Redstone Logics LLC received the asserted patent from Empire Technology, a subsidiary of Allied Inventors Management, LLC, which itself spun out of Intellectual Ventures LLC. The lawsuit alleges that AMD infringes U.S. Patent No. 8,549,339, which generally relates to "Processor core communication in multi-core processor". More specifically, the patent describes technology for multi-core processors featuring two sets of processor cores, each with its own supply voltage and an independent phase-locked loop (PLL) clock signal, covering aspects of power management and multi-core processor operational logic. While specific accused AMD products are not detailed in the available summary, the infringement claims are understood to target AMD's multi-core processors.

The case was filed on April 18, 2025, in the U.S. District Court for the Western District of Texas, case number 7:2025cv00182. The assigned judge is David Counts, with Magistrate Judge Derek T. Gilliland also involved, having issued various orders in the case. This venue is particularly notable for patent litigation; the Western District of Texas, especially its Waco division, has historically attracted a high volume of patent infringement cases, largely due to its expedited dockets and procedural rules preferred by patent plaintiffs, including NPEs. Even with recent changes affecting automatic assignment to Judge Alan Albright, the district remains a significant forum for patent disputes and NPE filings.

This litigation is part of a broader patent assertion campaign by Redstone Logics LLC, which has concurrently filed similar lawsuits asserting the same multi-core processing patent against other major technology companies, including Apple, NVIDIA, MediaTek, NXP Semiconductors, and Qualcomm. The assertion against a leading chip manufacturer like AMD highlights the potential industry-wide impact of the claims regarding fundamental multi-core processor technology. Furthermore, the asserted '339 patent is currently undergoing reexamination at the USPTO, indicating parallel challenges to its validity. In related cases, such as Redstone Logics v. NXP, inter partes review (IPR) petitions have been filed against the '339 patent, suggesting that PTAB proceedings are a component of the overall litigation landscape for this patent family.

The patent infringement lawsuit Redstone Logics LLC v. Advanced Micro Devices, Inc. (Case no. 7:2025cv00182) was filed in the U.S. District Court for the Western District of Texas on April 18, 2025, asserting U.S. Patent No. 8,549,339. The case is currently active.

Here's a chronological summary of the key legal developments:

Filing & Initial Pleadings:

• 2025-04-18: Redstone Logics LLC filed its complaint against Advanced Micro Devices, Inc. in the Western District of Texas. This filing was part of a "multicore processing campaign" by Redstone Logics, with simultaneous suits filed against Apple and NVIDIA.
• 2025-06-30: Advanced Micro Devices, Inc. filed its Answer and Affirmative Defenses to the Plaintiff's Complaint.

Pre-trial Motions of Substance:

• 2025-06-24: Advanced Micro Devices, Inc. filed a "Stipulated Motion to Dismiss Plaintiff's Presuit Indirect Infringement Claims."
• 2025-07-30: Judge David Counts granted the stipulated motion to dismiss, removing Redstone Logics' presuit indirect infringement claims from the case.
• 2025-09-19: An order was signed by Judge Derek T. Gilliland cancelling an initial pretrial conference that was to be held in person.

Claim Construction (Markman) Outcomes:
While no Markman order for this specific case appears in the provided docket snippets, claim construction for U.S. Patent No. 8,549,339 has been established in related litigation.

• 2025-02-21: In a related case, Redstone Logics LLC v. MediaTek, Inc. (7:24-cv-00029), Magistrate Judge Derek T. Gilliland issued an order outlining final claim construction rulings for claims 1, 14, and 21 of the '339 patent after a Markman hearing on February 19, 2025.
• 2025-10-15: A claim construction order and memorandum concerning the '339 patent was issued in Redstone Logics LLC v. Qualcomm Inc. et al. (7:24-cv-00231-ADA).
• 2025-11-20: In Redstone Logics LLC v. Apple, Inc. (7:25-cv-00183), the parties jointly moved for and were granted entry of the prior claim construction record from the Qualcomm case into their proceedings. This effectively adopted the claim construction for the '339 patent in that case. Given the common patent and plaintiff, it is highly probable that the claim construction from these related cases will guide or be adopted in the AMD litigation.

Discovery Milestones:

• 2025-09-15: A Rule 26(f) Discovery Report/Case Management Plan was filed by Redstone Logics LLC.
• In a parallel case against Qualcomm (7:24-cv-00231-ADA), a scheduling order from January 27, 2025, indicated that fact discovery was to open on June 10, 2025, and final infringement and invalidity contentions were due by August 4, 2025. These dates provide an indication of the likely discovery schedule in related cases involving the same patent.

Parallel PTAB IPR/PGR Proceedings:
U.S. Patent No. 8,549,339 has been challenged in at least two inter partes review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB).

• 2025-01-21: NXP USA, Inc. et al. filed IPR2025-00485 challenging the '339 patent. The PTAB issued a "Director Discretionary Decision: Deny" on July 9, 2025, meaning institution of the IPR was denied.
• 2024-12-03: MediaTek, Inc. and MediaTek USA, Inc. also filed an IPR against Redstone Logics LLC for the '339 patent, identified as IPR2025-00085. The outcome of this specific IPR is not detailed in the provided information, but a resolution between Redstone Logics and MediaTek was noticed around April 2025.

Current Posture:
The case Redstone Logics LLC v. Advanced Micro Devices, Inc. (7:2025cv00182) is active. Based on the latest available docket information from September 2025, the case is in its pre-trial phase, having completed initial pleadings and addressed early motions. While no trial or final judgment has occurred, key claim construction issues for the asserted patent have been addressed in related cases, which typically streamline proceedings in parallel litigation.

Notably, another related case, Redstone Logics LLC v. NXP Semiconductors (7:24-cv-00028), involving the same patent, was dismissed with prejudice for the plaintiff's claims on May 13, 2026, via a stipulated order.

Redstone Logics LLC is represented by attorneys from Russ August & Kabat. The following individuals are counsel of record for the plaintiff:

• Christian W. Conkle

  • Firm: Russ August & Kabat, Los Angeles, California.
  • Role: Likely lead or significant counsel given his prominence in patent litigation at the firm.
  • Experience: Co-Chair of Russ August & Kabat's Litigation Department, focusing on intellectual property and complex commercial litigation. He has represented both plaintiffs and defendants in patent infringement cases across various technologies.

• Marc A. Fenster

  • Firm: Russ August & Kabat, Los Angeles, California.
  • Role: Likely lead counsel given his extensive experience and leadership position.
  • Experience: Head of Russ August & Kabat's Intellectual Property practice, widely recognized as a leading patent litigator with a strong track record in high-stakes cases and significant jury verdicts.

• Reza Mirzaie

  • Firm: Russ August & Kabat, Los Angeles, California.
  • Role: Counsel.
  • Experience: Specializes in intellectual property litigation, including patent, copyright, and trade secret disputes, with experience representing clients in various technology sectors.

• Neil A. Rubin

  • Firm: Russ August & Kabat, Los Angeles, California.
  • Role: Counsel.
  • Experience: Focuses on intellectual property litigation, including patent infringement, and has experience in all phases of litigation, from pre-filing investigation to trial.

• Joshua Scheufler

  • Firm: Russ August & Kabat, Los Angeles, California.
  • Role: Counsel.
  • Experience: Concentrates on patent and other intellectual property litigation, representing clients in federal district courts and before the PTAB.

• Jonathan Ma

  • Firm: Russ August & Kabat, Los Angeles, California.
  • Role: Counsel.
  • Experience: Practices intellectual property litigation, particularly patent infringement, and has a background in electrical engineering.

• Qi (Peter) Tong

  • Firm: Russ August & Kabat, Los Angeles, California.
  • Role: Counsel, and is noted for filing the Rule 26(f) Discovery Report/Case Management Plan for Redstone Logics LLC.
  • Experience: Focuses on patent and other intellectual property litigation, with experience in a wide range of technologies. He has been involved in several other cases in the Western District of Texas.

Defendant Advanced Micro Devices, Inc. (AMD) is represented by counsel from several firms in this case, 7:2025cv00182, in the U.S. District Court for the Western District of Texas.

Key Defendant Counsel:

• Chris M. Katsantonis (Lead Counsel)

  • Firm: DLA Piper LLP (US)
  • Office Location: Austin, TX (likely, as DLA Piper has a strong presence in Texas and often handles patent litigation there).
  • Note: Mr. Katsantonis was granted pro hac vice admission on July 2, 2025, to represent AMD, indicating he is a lead attorney in the case. DLA Piper has a notable intellectual property and technology practice, with attorneys experienced in complex patent litigation, including in the semiconductor space. Helena Kiepura, for example, is a partner in DLA Piper's Patent Litigation group and specializes in Section 337 investigations before the ITC, and also represents clients in patent and trade secret matters in federal district court and in inter partes review proceedings before the U.S. Patent and Trademark Office. She has experience litigating semiconductor products.

• Jennifer Librach Nall (Local Counsel/Admitting Attorney)

  • Firm: DLA Piper LLP (US)
  • Office Location: Austin, TX (consistent with her filing the pro hac vice motion for Mr. Katsantonis).
  • Note: Ms. Nall filed the motion for Chris M. Katsantonis to appear pro hac vice and also filed AMD's Answer and Affirmative Defenses and Rule 7 Disclosure Statement on behalf of AMD, indicating her role as local or supporting counsel.

Potential In-House Counsel:

While specific in-house counsel appearances on the docket are not detailed in the provided search results, it is common for large corporations like AMD to have in-house legal teams overseeing litigation.

• Ava Hahn
  • Role: Senior Vice President, General Counsel and Corporate Secretary.
  • Firm: Advanced Micro Devices, Inc. (In-House)
  • Note: Ms. Hahn oversees AMD's worldwide legal and corporate governance matters, ethics and compliance programs, and public affairs. While she may not be actively litigating in court, she would be involved in managing the overall legal strategy for AMD in this and other patent infringement cases.

As of the last docket retrieval on September 19, 2025, Chris M. Katsantonis and Jennifer Librach Nall are the explicitly identified attorneys representing Advanced Micro Devices, Inc..