Mimzi, LLC v. Mercedes-Benz AG

Case Overview and Background

This patent infringement lawsuit pits Mimzi, LLC, a non-practicing entity (NPE), against Mercedes-Benz AG, a major German automotive manufacturer. Filed on June 4, 2025, the case centers on allegations that Mercedes-Benz's in-vehicle infotainment and connectivity systems, potentially including its Mercedes-Benz User Experience (MBUX), infringe on Mimzi's patent. The lawsuit is part of a broader assertion campaign by Mimzi, which has filed similar suits against other major automakers like Honda, Nissan, and Ford in the same district. This pattern of litigation targets the automotive industry's increasing reliance on sophisticated, software-driven features for voice commands, navigation, and in-car services.

The single patent-in-suit is U.S. Patent No. 9,792,361, titled "Photographic Memory." The patent generally relates to a system for using a device to record audio from conversations or meetings and storing associated data, such as metadata and speech-recognized text, in a searchable, centralized repository. Mimzi alleges that Mercedes-Benz vehicles equipped with systems that can process spoken keywords and provide connected-car features infringe upon this technology. The case is currently active in the U.S. District Court for the Eastern District of Texas and has been assigned to Judge Rodney Gilstrap, the nation's busiest patent judge.

The case is notable for several reasons. It highlights the continued targeting of the automotive sector by NPEs as cars become more technologically complex. The choice of venue is significant; the Eastern District of Texas has historically been, and has recently returned to being, the most popular district for patent litigation, particularly for NPEs, despite a temporary decline after the Supreme Court's 2017 TC Heartland decision on patent venue. Judge Gilstrap's courtroom, in particular, handles a substantial percentage of all U.S. patent cases and has been the site of several high-dollar verdicts. Furthermore, the patent's validity is being challenged in a parallel proceeding. On October 29, 2025, Unified Patents, an organization that challenges patents asserted by NPEs, filed for an ex parte reexamination of the '361 patent, and the U.S. Patent and Trademark Office granted the request on December 4, 2025, finding "substantial new questions of patentability." This concurrent administrative challenge could significantly impact the district court litigation.

Key Legal Developments and Case Status

This section outlines the significant legal events in the patent infringement litigation between Mimzi, LLC and Mercedes-Benz AG, based on a review of the court docket and related legal reporting. The case is active, with several key motions pending and a parallel patent validity challenge underway.

Chronological Developments:

• 2025-06-04: Complaint Filed
  Mimzi, LLC filed its complaint against Mercedes-Benz AG, alleging infringement of U.S. Patent No. 9,792,361. The complaint accuses Mercedes-Benz's in-vehicle infotainment systems, including the Mercedes-Benz User Experience (MBUX), of infringing the patent by processing spoken keywords and providing connected-car features. (Case No. 2:25-cv-00603, Dkt. 1).

• 2025-08-15: Defendant's Answer and Counterclaims
  Mercedes-Benz AG filed its answer, denying infringement and asserting invalidity of the '361 patent. The defendant also filed counterclaims seeking a declaratory judgment of non-infringement and invalidity of all claims of the patent-in-suit. (Case No. 2:25-cv-00603, Dkt. 12).

• 2025-10-29: Parallel Ex Parte Reexamination Requested
  Unified Patents, a third-party organization that challenges patents asserted by non-practicing entities, filed a request for ex parte reexamination of the '361 patent with the U.S. Patent and Trademark Office (USPTO). This action challenges the patent's validity on grounds of prior art, running parallel to the district court case.

• 2025-12-04: USPTO Grants Reexamination Request
  The USPTO granted the request for ex parte reexamination of the '361 patent, finding that the request raised "substantial new questions of patentability" regarding claims 1-20. This initiated a formal review of the patent's validity by a USPTO examiner.

• 2026-01-20: Mercedes-Benz Files Motion to Stay
  Citing the ongoing ex parte reexamination, Mercedes-Benz filed a motion to stay the district court litigation pending the outcome of the USPTO's review. In its motion, Mercedes-Benz argued that a stay would conserve judicial and party resources, as the reexamination could potentially invalidate or narrow the asserted patent claims, thereby simplifying or mooting the district court case. (Case No. 2:25-cv-00603, Dkt. 25).

• 2026-02-10: Mimzi Opposes Motion to Stay
  Mimzi, LLC filed its opposition to the motion to stay. Mimzi argued that a stay would be unduly prejudicial, causing unnecessary delay and allowing Mercedes-Benz to continue its alleged infringement. The plaintiff contended that ex parte reexaminations have a lower likelihood of invalidating all claims compared to inter partes reviews and that the case should proceed in the Eastern District of Texas without waiting for the USPTO. (Case No. 2:25-cv-00603, Dkt. 30).

Current Posture and Next Steps:

As of May 10, 2026, the case remains active and in the pre-trial phase. The most critical pending issue is the court's decision on Mercedes-Benz's motion to stay the litigation. Judge Rodney Gilstrap has not yet ruled on the motion.

The outcome of the motion will significantly shape the near-term future of the case.

• If the stay is granted, the district court proceedings will be paused until the USPTO concludes the ex parte reexamination of the '361 patent. This process can often take more than a year.
• If the stay is denied, the case will proceed toward claim construction (Markman hearing), discovery, and potentially a trial, while the reexamination continues in parallel at the USPTO.

No trial date has been set, and the case has not yet reached the claim construction stage. The parallel USPTO reexamination adds a layer of uncertainty for both parties, as a final decision of invalidity from the patent office could be dispositive of the entire litigation.

Based on a review of the court docket and related filings, counsel for Plaintiff Mimzi, LLC are from the firm Kent & Risley LLC.

Plaintiff's Counsel of Record

Firm: Kent & Risley LLC
The firm is an intellectual property litigation boutique.

• Name: Cortney S. Alexander

  • Role: Lead Counsel
  • Firm: Kent & Risley LLC
  • Office Location: Alpharetta, Georgia
  • Note: Alexander has nearly 20 years of experience in patent litigation and has served as lead counsel in over 120 patent infringement cases. A docket entry in this case confirms his appearance for Mimzi, LLC, as he filed the executed summons on July 10, 2025.

• Name: Daniel A. Kent

  • Role: Counsel (Likely backup or of counsel)
  • Firm: Kent & Risley LLC
  • Office Location: Alpharetta, Georgia
  • Note: Kent has over 34 years of experience in intellectual property litigation, including as a founding partner of Fish & Richardson's Atlanta office. He is listed as counsel for Mimzi in nearly identical lawsuits filed concurrently against other automotive companies. A USPTO document in a separate matter identifies him as "backup counsel" to Mr. Alexander.

There is no indication from the docket that local counsel has appeared for the plaintiff. Filings to date have been submitted by Mr. Alexander.

Based on docket entries and further research, the following counsel have appeared on behalf of the defendant, Mercedes-Benz AG, in the case of Mimzi, LLC v. Mercedes-Benz AG.

Lead Counsel

Name: Celine Jimenez Crowson

• Role: Lead Counsel
• Firm: Hogan Lovells US LLP
• Office: Washington, D.C.
• Note: A first-chair trial lawyer, Crowson heads the Americas Intellectual Property, Media, and Technology (IPMT) group at Hogan Lovells and has previously served as lead trial counsel for Mercedes-Benz in other patent infringement litigation.

Name: Joseph J. Raffetto

• Role: Counsel
• Firm: Hogan Lovells US LLP
• Office: Washington, D.C.
• Note: A partner with a background in computer engineering, Raffetto's practice focuses on high-tech and automotive patent litigation, and he has deep experience with matters involving connected cars and autonomous driving.

Local Counsel

Name: Michael E. Jones

• Role: Local Counsel
• Firm: Potter Minton, P.C.
• Office: Tyler, Texas
• Note: Jones is a highly experienced trial lawyer in the Eastern District of Texas, frequently representing Fortune 500 companies in patent infringement cases and recognized as a "go to" lawyer for intellectual property litigation.

Name: Shaun William Hassett

• Role: Local Counsel
• Firm: Potter Minton, P.C.
• Office: Tyler, Texas
• Note: Hassett's practice centers on complex patent litigation involving a wide range of technologies, including automotive products, and he has extensive experience in the Eastern District of Texas.