United States CP LLC v. Samsung Electronics Co Ltd

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: United States CP, LLC (Delaware)
  • Defendant: Samsung Electronics Co., Ltd. (South Korea) and Samsung Electronics America, Inc. (New York)
  • Plaintiff’s Counsel: Williams Simons & Landis PC
• Case Identification: 2:26-cv-00083, E.D. Tex., 02/02/2026
• Venue Allegations: Venue is alleged to be proper for Samsung Electronics Co., Ltd. as a foreign entity and for Samsung Electronics America, Inc. based on its asserted regular and established place of business in Plano, Texas, within the district.
• Core Dispute: Plaintiff alleges that a wide range of Defendant’s smartphones and tablets infringes two patents related to physical finger guides and methods designed to improve the accuracy of fingerprint scanning.
• Technical Context: The technology addresses the challenge of ensuring consistent finger placement on the small fingerprint sensors common in consumer electronics to reduce authentication failures.
• Key Procedural History: The complaint alleges an extensive history of pre-suit communications starting in 2012 between the patents' prior owner and Samsung regarding the patent portfolio. It further alleges that a 2014 Samsung international patent application cited a member of the asserted patents' family as relevant prior art, a fact which may be material to the plaintiff's claims of willful infringement.

Case Timeline

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 9,760,753 - "Finger Guide Device"

• Patent Identification: U.S. Patent No. 9,760,753, titled “Finger Guide Device,” issued September 12, 2017 Compl. ¶20

The Invention Explained

• Problem Addressed: The patent describes that as fingerprint sensors on electronic devices became smaller for cost and design reasons, the rate of "false rejects" increased because users would inconsistently place their fingers on the sensor Compl. ¶22 ’753 Patent, col. 2:1-15 Systems that create a composite fingerprint "template" from multiple smaller scans during enrollment are particularly vulnerable to this placement inconsistency during later authentication attempts ’753 Patent, col. 2:36-44
• The Patented Solution: The patent proposes a method for authentication that relies on a uniquely shaped physical finger guide surrounding the sensor Compl. ¶22 This guide features a recess with a "short concave radius" at the front (where the fingertip rests) and a "longer concave radius" at the back, which non-forcibly directs the finger to a repeatable "stable position of global minimum" over the sensor ’753 Patent, col. 4:22-35 ’753 Patent, claim 1 The method first enrolls a user by scanning overlapping portions of a finger to create a large template, then authenticates by comparing a subsequent scan to that template Compl. ¶21
• Technical Importance: The invention aimed to improve the usability and reliability of biometric security on consumer electronics by addressing a key human-factor challenge in a way that accommodates smaller, cost-effective sensors ’753 Patent, col. 2:16-20

Key Claims at a Glance

• The complaint asserts infringement of at least independent Claim 1 Compl. ¶51
• The essential elements of Claim 1 include:
  • An enrollment step of scanning several overlapping portions of a finger and assembling them into a completed template that is larger than any single scanned portion.
  • An authentication step using a fingerprint scanner located within a finger guide device.
  • The finger guide has side surfaces forming a recess with a short concave radius at its front end and a longer concave radius at its back end.
  • The guide slidingly guides the finger downward to a "stable position of global minimum" over the scanner, ensuring the finger touches the sensor in a consistent location for comparison with the template.
• The complaint asserts infringement of "one or more claims," which may implicitly reserve the right to assert dependent claims Compl. ¶51

U.S. Patent No. 9,830,493 - "Finger Guide Device with Capacitive Sensor"

• Patent Identification: U.S. Patent No. 9,830,493, titled “Finger Guide Device with Capacitive Sensor,” issued November 28, 2017 Compl. ¶26

The Invention Explained

• Problem Addressed: The patent addresses the same problem as the ’753 Patent: the need for a reliable way to guide a user's finger onto a small sensor to reduce authentication errors ’493 Patent, col. 2:45-54
• The Patented Solution: This patent claims a physical device, rather than a method. The device is a finger guide with a "funnel shaped" recess that directs a fingertip to a base where a capacitive fingerprint scanner is located Compl. ¶27 A key structural element is a "drive ring" on the surface of the guide that provides an electrical signal to "illuminate" the fingerprint for the sensor. The device is also explicitly configured to function as a pointing control device, allowing for touch gestures like swipes ’493 Patent, abstract ’493 Patent, claim 1
• Technical Importance: The invention integrates biometric authentication and user interface navigation (gestural control) into a single physical component, potentially streamlining device design and improving functionality ’493 Patent, col. 7:54-67

Key Claims at a Glance

• The complaint asserts infringement of at least independent Claim 1 Compl. ¶69
• The essential elements of Claim 1 include:
  • A finger guide device with side surfaces forming a "funnel shaped" recess with a circular, oval, square, or rectangular mouth.
  • A capacitive fingerprint scanner aligned within the recess.
  • A "drive ring" on the surface of the guide to provide an electrical signal to illuminate portions of the fingerprint.
  • Configuration as a "pointing control device" that accepts touch gestures in axial, lateral, or combined directions.
• The complaint asserts infringement of "one or more claims," which may implicitly reserve the right to assert dependent claims Compl. ¶69

III. The Accused Instrumentality

Product Identification

• A broad range of Samsung smartphones and tablets, including various models from the Galaxy S, Galaxy Note, Galaxy A, Galaxy Z, and Galaxy Tab series Compl. ¶31

Functionality and Market Context

• The accused products are mass-market consumer electronic devices that utilize fingerprint scanners for biometric security features such as unlocking the device and accessing secure applications Compl. ¶¶52-53 The complaint alleges that the user enrollment process for this feature involves scanning a fingerprint multiple times Compl. ¶54 A screenshot from a product tutorial shows a user being instructed to "Reposition your finger each time to capture the edges of your fingerprint," which the complaint alleges creates a composite template from overlapping scans Compl. ¶55 Compl. p. 15 The complaint also alleges that certain devices, like the Galaxy S10e, use the fingerprint sensor to detect gestures, such as swiping to open the notification panel Compl. ¶73

IV. Analysis of Infringement Allegations

’753 Patent Infringement Allegations

• Identified Points of Contention:
  • Scope Questions: A primary issue may be whether the physical structures in the accused devices meet the definition of a "finger guide device" with a "recess" having different "short" and "longer" concave radii. The complaint provides an image of an in-display fingerprint sensor that appears to be part of a flat glass screen, raising the question of whether such a configuration can possess the claimed three-dimensional geometry Compl. p. 16
  • Technical Questions: The complaint alleges that the accused devices' software creates a template "larger than any single scanned portion" Compl. ¶55 The case may require technical evidence to substantiate how the accused software internally processes and stores fingerprint data during the enrollment phase.

’493 Patent Infringement Allegations

• Identified Points of Contention:
  • Scope Questions: The construction of "funnel shaped" will be relevant, but a more critical dispute may arise over the term "drive ring." The patent specification depicts the drive ring as a distinct physical component in an assembly drawing ’493 Patent, Fig. 2 The complaint does not provide visual evidence of such a component in the accused devices, raising the question of whether a part of the sensor itself or another structure can be construed to meet this limitation.
  • Technical Questions: The infringement allegation for the "drive ring" claim element may depend on technical evidence demonstrating how the accused sensor assembly generates and uses an "electrical signal to illuminate partial portions of the fingerprint," and whether that mechanism is functionally and structurally equivalent to the claimed ring.

V. Key Claim Terms for Construction

• The Term: "recess having a short concave radius at front end...and having a longer concave radius...at the back end" (’753 Patent, Claim 1)

• Context and Importance: This term defines the specific geometry of the finger guide and is central to the infringement analysis for the ’753 Patent. Its construction will determine whether the physical design of the accused devices, especially those with seemingly flat in-display sensors, falls within the claim's scope.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification states the goal is to "non-forcibly encourag[e] the finger into the correct position" ’753 Patent, col. 2:57-58 An argument could be made that any physical contouring, however subtle, that achieves this guiding function satisfies the claim's purpose.
  • Evidence for a Narrower Interpretation: The patent analogizes the guide to a "funnel like or inverted pyramid like guide" and a ball rolling to a "global minimum," suggesting a distinct, three-dimensional structure ’753 Patent, col. 2:55-56 ’753 Patent, col. 3:19-22 The patent figures consistently depict a pronounced physical recess, which could support a narrower construction requiring a more substantial structure than the bezel around a flat sensor (e.g., ’753 Patent, Fig. 1, Fig. 3B).

• The Term: "drive ring" (’493 Patent, Claim 1)

• Context and Importance: This is a key structural limitation in the asserted claim of the ’493 Patent. Since the complaint provides no direct visual evidence of this component, the definition of "drive ring" will be dispositive for infringement.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: A party might argue that "drive ring" should be construed functionally to mean any conductive element that surrounds the sensor and provides an electrical signal for capacitive sensing, regardless of whether it is a discrete component.
  • Evidence for a Narrower Interpretation: The patent’s Figure 2 explicitly shows the "drive ring 17" as a separate component in the assembly, distinct from the finger guide (12) and the sensor (16) ’493 Patent, Fig. 2 The specification describes the drive ring as being "exposed" and the finger guide as a "supplement" to it, which suggests they are separate structures ’493 Patent, col. 10:48-50 This may support a construction requiring a distinct physical ring.

VI. Other Allegations

• Indirect Infringement: The complaint alleges induced infringement based on Samsung’s customer support and instructional materials, which allegedly encourage and guide end-users to use the accused products in an infringing manner Compl. ¶¶65, 80 It also alleges contributory infringement, asserting that the accused finger guide and sensor are special features constituting a material part of the invention and are not staple articles of commerce suitable for substantial non-infringing use Compl. ¶¶66, 81
• Willful Infringement: Willfulness is alleged based on extensive pre-suit knowledge of the patent portfolio dating back to communications in 2012 Compl. ¶¶35-43 The complaint further supports this allegation by noting that Samsung's own 2014 international patent application cited the patents-in-suit's parent application as relevant prior art, suggesting knowledge within Samsung's legal or R&D departments Compl. ¶¶44-47 Post-suit knowledge is also alleged Compl. ¶¶60, 74

VII. Analyst’s Conclusion: Key Questions for the Case

• A core issue will be one of structural scope: Can the claims’ requirements for specific three-dimensional geometries—such as a "recess" with differential "concave radii" (’753 Patent) and a distinct "drive ring" (’493 Patent)—be construed to read on the integrated and often physically subtle sensor implementations in modern smartphones?
• A key evidentiary question will be one of technical proof: Beyond user-facing instructions, what technical evidence can the plaintiff provide to demonstrate the internal software and hardware operations of the accused devices, specifically the alleged creation of a "larger than any single scanned portion" data template (’753 Patent) and the function of the alleged "drive ring" (’493 Patent)?
• A third central question will concern willfulness: Given the complaint’s detailed allegations of pre-suit knowledge dating back over a decade, the factual development surrounding Samsung’s alleged awareness of the patent portfolio will be a critical aspect of the case, particularly regarding potential damages enhancement.