Lepton Computing LLC v. Samsung Electronics America Inc et al.

Case Overview and Background

This patent infringement suit pits Lepton Computing LLC, a firm that presents itself as an early pioneer of foldable technology, against Samsung, the world's dominant manufacturer of foldable smartphones. Lepton, which has not commercialized its own products and is described in legal reporting as a patent assertion entity (PAE), alleges that Samsung's entire line of popular Galaxy Z foldable phones infringes on its intellectual property. The accused products span the full range of Samsung's foldable offerings, including the Galaxy Z Flip, Galaxy Z Fold, and the newer Galaxy Z TriFold models, but are limited to the third generation and newer devices. Samsung, a global operating company and frequent target of patent litigation, holds a commanding share of the foldable market, estimated at 64% in late 2025.

The lawsuit, filed in the U.S. District Court for the Eastern District of Texas, asserts a portfolio of nine patents that reportedly cover foundational aspects of modern foldable devices. While specific patent titles could not be individually verified through automated search, legal news reports describe the portfolio as pertaining to core technologies such as flexible display structures, hinge mechanisms, the arrangement of internal components, and user interface software like "app continuity," which manages how applications function as the device is folded and unfolded. The asserted patents are U.S. Patent Nos. 11,693,450; 11,086,361; 11,048,299; 11,209,863; 12,140,998; 11,093,002; 11,520,378; 11,520,377; and 11,048,300. The case (2:26-cv-00338) was assigned to Judge Rodney Gilstrap, who presides over one of the largest patent dockets in the nation. The Eastern District of Texas is a significant venue for patent litigation, known for its experienced judiciary and local rules that can facilitate a faster path to trial, a factor often considered favorable by patent plaintiffs.

The case is notable for its direct challenge to a key growth sector in the premium smartphone market. Lepton is seeking both monetary damages and a permanent injunction that would ban the sale of Samsung's foldable phones in the U.S. The litigation also highlights a critical issue that will likely be a focal point of Samsung's defense: the timing of the patents. News reporting indicates that the earliest of Lepton's asserted patents was not granted until June 2021, nearly two years after Samsung launched its first commercial foldable phone in 2019. This timeline discrepancy will fuel vigorous disputes over the validity of the patents and whether Samsung could have infringed patents that were not yet issued. Lepton counters by claiming it held discussions and shared its technology with Samsung as early as 2013, arguing Samsung was aware of its inventions long before bringing its own products to market. The outcome of this high-stakes confrontation could significantly impact the competitive landscape of the foldable device market.

Case Remains in Infancy with No Substantive Rulings

As of May 14, 2026, the patent infringement lawsuit between Lepton Computing and Samsung is in its earliest procedural stages. Barely three weeks have passed since the complaint was filed, and the docket reflects only the initial filings. There have been no substantive legal rulings, and the final outcome is likely years away, pending the expected vigorous defense from Samsung.

Here is a chronological summary of developments to date:

• 2026-04-23: Complaint Filed. Lepton Computing LLC filed its complaint for patent infringement against Samsung Electronics America, Inc. and Samsung Electronics Co., Ltd. in the U.S. District Court for the Eastern District of Texas. The filing alleges that Samsung's Galaxy Z series of foldable smartphones infringes on nine of Lepton's patents. Lepton is seeking damages, royalties, and a permanent injunction to halt sales of the accused products.

• Case Assigned: The case, docket number 2:26-cv-00338, was assigned to Chief Judge J. Rodney Gilstrap in the Marshall division, a prominent venue for patent litigation.

Currently, the case is awaiting Samsung's formal response. As of today, no counsel has appeared for the defendants, and no answer, motion, or other pleading has been filed on their behalf.

Anticipated Future Developments

While the docket is presently quiet, several legal maneuvers are standard in a high-stakes case like this and are expected in the coming months:

• Answer and Counterclaims: Samsung will file an answer to the complaint, likely denying all allegations of infringement and asserting that Lepton's patents are invalid. They will almost certainly file counterclaims seeking a declaratory judgment of non-infringement and invalidity.

• Motion to Dismiss or Transfer: It is common for a large corporate defendant like Samsung to file early motions to challenge the lawsuit. This could include a motion to dismiss for failure to state a claim or, more likely, a motion to transfer the case out of the Eastern District of Texas to a venue it considers more convenient, such as the Northern District of California, where its U.S. headquarters are located.

• Parallel PTAB Proceedings (High Probability): Samsung is very likely to challenge the validity of Lepton's nine asserted patents before the U.S. Patent and Trademark Office's Patent Trial and Appeal Board (PTAB). By filing petitions for Inter Partes Review (IPR), Samsung can ask the PTAB's administrative patent judges to cancel the patent claims based on prior art. This is a common defensive strategy used to invalidate patents in a specialized forum that can be more favorable to accused infringers than district courts. If the PTAB agrees to institute a review, Samsung will likely ask Judge Gilstrap to stay (pause) the district court case until the PTAB proceedings are complete, arguing it would be inefficient to litigate patents that may soon be invalidated. As of now, no IPR petitions related to Lepton's patents have been made public.

• Claim Construction (Markman Hearing): Should the case proceed, a critical stage will be claim construction, where the court determines the legal meaning of key terms in the patent claims. This Markman ruling is often pivotal, as it defines the scope of the patent holder's rights and can significantly influence the outcome of infringement and validity arguments.

The timeline discrepancy noted in public reports—whereby Samsung's first foldable phone was released nearly two years before Lepton's earliest asserted patent was granted—is expected to be a central issue in Samsung's defense. Lepton's counter-narrative, that it disclosed its technology to Samsung as early as 2013, will be a key element in its attempt to prove willful infringement.

Plaintiff Representatives

Lepton Computing LLC has retained counsel from three law firms: Susman Godfrey L.L.P., The Dacus Firm, P.C., and The Mort Law Firm, PLLC. These attorneys filed the original complaint on behalf of the plaintiff.

• Name: Stephen E. Sussman

• Role: Lead Counsel

• Firm: Susman Godfrey L.L.P. (Los Angeles, CA)

• Note: Sussman is a seasoned trial lawyer known for handling high-stakes intellectual property and technology cases for both plaintiffs and defendants.

• Name: Andres C. Chaglayan

• Role: Of Counsel

• Firm: Susman Godfrey L.L.P. (Los Angeles, CA)

• Note: Chaglayan focuses on complex commercial litigation, including patent and technology disputes.

• Name: Davida P. Brook

• Role: Of Counsel

• Firm: Susman Godfrey L.L.P. (Los Angeles, CA)

• Note: Brook has experience representing clients in a variety of intellectual property matters and commercial litigation.

• Name: Jordan R. Jaffe

• Role: Of Counsel

• Firm: Susman Godfrey L.L.P. (San Francisco, CA)

• Note: Jaffe specializes in patent litigation and has represented technology clients in cases involving complex software and hardware.

• Name: T. John "Johnny" Ward Jr.

• Role: Local Counsel

• Firm: The Dacus Firm, P.C. (Tyler, TX)

• Note: Ward is a highly experienced litigator in the Eastern District of Texas and the son of retired EDTX Judge T. John Ward, often serving as local counsel for parties in major patent cases.

• Name: Wesley Hill

• Role: Local Counsel

• Firm: The Dacus Firm, P.C. (Tyler, TX)

• Note: Hill is a partner at the firm and frequently litigates patent cases in the Eastern District of Texas.

• Name: Claire Abernathy Henry

• Role: Local Counsel

• Firm: The Dacus Firm, P.C. (Tyler, TX)

• Note: Henry is an experienced litigator with a practice that includes intellectual property disputes in East Texas.

• Name: S. Calvin Capshaw

• Role: Local Counsel

• Firm: The Mort Law Firm, PLLC (Austin, TX)

• Note: While based in Austin, Capshaw is a veteran patent litigator with extensive experience handling cases specifically within the Eastern District of Texas.

• Name: Elizabeth L. "Betty" DeRieux

• Role: Local Counsel

• Firm: The Mort Law Firm, PLLC (Austin, TX)

• Note: DeRieux focuses on intellectual property litigation and frequently represents clients in Texas district courts.

• Name: D. Jeffrey Rambin

• Role: Local Counsel

• Firm: The Mort Law Firm, PLLC (Austin, TX)

• Note: Rambin has a background in intellectual property law and represents clients in patent infringement lawsuits.

Counsel for Samsung Has Not Yet Appeared

As of May 14, 2026, defendants Samsung Electronics America, Inc. and Samsung Electronics, Co., Ltd. have not yet made a formal appearance in the case Lepton Computing LLC v. Samsung (2:26-cv-00338). A review of the public docket reveals no notices of appearance filed by counsel for the defendants.

Samsung is still within the standard timeframe for responding to the complaint, which was filed on April 23, 2026. It is routine for defendants in complex patent cases to secure an extension of time before filing a responsive pleading. An appearance by counsel will be made public when they file their first document with the court, such as an answer, a motion to dismiss, or a motion for an extension.

While no attorneys are officially on the record for this case, Samsung frequently retains major national law firms for its high-stakes patent litigation matters, particularly in the Eastern District of Texas. Based on recent and past representations, counsel could potentially come from firms such as:

• Kirkland & Ellis LLP: This firm has a long-standing relationship with Samsung and recently represented them in a Federal Circuit appeal involving semiconductor patents, securing a win for Samsung in a decision finalized in July 2024.
• DLA Piper: This firm achieved a significant victory for Samsung in the Eastern District of Texas in October 2025, overturning a $112 million jury verdict in a patent infringement case.
• Williams & Connolly LLP: The firm successfully represented Samsung in securing a dismissal of a patent suit related to touch screen technology in March 2025.

These examples are illustrative of Samsung's typical defense strategy, which involves engaging elite trial firms with deep experience before popular patent venues and appellate courts. The specific firm and attorneys chosen to lead the defense against Lepton's claims will become public upon their first filing.