Comarco Wireless Systems LLC v. Transcend Information Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Comarco Wireless Systems LLC (Texas)
  • Defendant: Micro-Star Int’l Co., Ltd. (Taiwan)
  • Plaintiff’s Counsel: Direction IP Law
• Case Identification: 2:25-cv-01245, E.D. Tex., 10/01/2026
• Venue Allegations: Venue is alleged to be proper because the Defendant is a foreign corporation not resident in the United States, which under 28 U.S.C. § 1391(c)(3) allows suit in any judicial district.
• Core Dispute: Plaintiff alleges that Defendant’s notebooks, mobile workstations, and power supplies, which implement industry-standard charging protocols such as USB Battery Charging 1.2, USB Power Delivery, and Qualcomm Quick Charge, infringe patents related to intelligent power delivery systems.
• Technical Context: The technology concerns a "handshake" process between a power source and a portable device to safely negotiate and deliver an appropriate level of power, a critical function in a market with a wide variety of electronic devices and charging standards.
• Key Procedural History: The patents-in-suit belong to a family claiming priority to a 2004 application. The complaint alleges that Defendant had pre-suit knowledge of the patents and infringement theories at least as of a notice letter sent on July 21, 2022, which is asserted as a basis for willful infringement.

Case Timeline

Date	Event
2004-01-15	Earliest Priority Date for '087, '042, and '187 Patents ('933 Application)
2013-07-16	Priority Application Filing Date for '187 Patent
2016-08-09	U.S. Patent No. 9,413,187 Issues
2020-12-01	U.S. Patent No. 10,855,087 Issues
2021-03-16	U.S. Patent No. 10,951,042 Issues
2022-07-21	Plaintiff sends notice letter to Defendant
2026-10-01	Complaint Filed

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

U.S. Patent No. 9,413,187 - Power Supply System Providing Power and Analog Data Signal for Use by Portable Electronic Device to Control Battery Charging

• Patent Identification: U.S. Patent No. 9,413,187, entitled “Power Supply System Providing Power and Analog Data Signal for Use by Portable Electronic Device to Control Battery Charging,” issued August 9, 2016 Compl. ¶16

The Invention Explained

• Problem Addressed: The proliferation of different portable devices and power sources (e.g., wall sockets, automobile outlets) created a risk of power mismatch, which could result in a failure to charge, damage to the device, battery overheating, or fire Compl. ¶13
• The Patented Solution: The patent describes a system where a charger and a portable device engage in a "handshake" to determine the correct power level Compl. ¶14 The system uses a multi-conductor connection where a third conductor receives a signal from the portable device and a fourth conductor transmits a response signal back to the device. The portable device uses this response signal to determine the power level of the power supply and control its charging accordingly Compl. ¶14
• Technical Importance: This approach provided a method for safely and efficiently managing power delivery between an increasing variety of devices and chargers, reducing the risk of damage from incompatible power levels Compl. ¶¶13-14

Key Claims at a Glance

• The complaint asserts direct infringement of independent claims 1 and 8, as well as dependent claims 2, 7, and 9 Compl. ¶20 Compl. ¶21
• Independent Claim 1 is directed to a system including a portable electronic device and an external power supply. Key elements include the power supply having data circuitry to receive a "first signal" from the device and provide a "second signal" back to it, with the second signal being an "analog signal" used by the device to determine a parameter level and control charging Compl. Ex. 4
• Independent Claim 7 is directed to the power supply system itself, with similar elements of power and data circuitry configured for a two-way signaling process to control charging Compl. Ex. 4
• The complaint reserves the right to modify its infringement descriptions based on discovery Compl. ¶21

U.S. Patent No. 10,855,087 - Power Supply Systems

• Patent Identification: U.S. Patent No. 10,855,087, entitled “Power Supply Systems,” issued December 1, 2020 Compl. ¶17

The Invention Explained

• Problem Addressed: As with the '187 patent, the invention addresses the problem of safely matching power delivery between various power sources and portable devices Compl. ¶13
• The Patented Solution: The '087 patent claims a power supply system with power and data circuitry configured to communicate with a portable device over a multi-conductor connector (Compl. ¶28; Ex. 5, p. 11). The system involves the data circuitry receiving a "first signal" originating from the device and, in coordination, providing a "second signal" back to the device. This second signal has a "parameter level" that the device can use to control the charging of its battery based on the available DC power (Compl. ¶28; Ex. 5, pp. 34-35).
• Technical Importance: The invention provides a framework for standardized power-delivery communication that enables intelligent and adaptive charging between varied power sources and portable devices Compl. ¶¶28-30

Key Claims at a Glance

• The complaint asserts infringement of independent claims 1 and 11, along with dependent claims 2, 5-8, 12, and 15-18 Compl. ¶27
• Independent Claim 1 recites a power supply system comprising:
  • power circuitry configured to provide direct current power; and
  • data circuitry configured to receive a first signal from a portable electronic device and to provide a second signal to be sent to the device;
  • wherein the data circuitry is further configured to provide the second signal with a "parameter level" that is usable by the portable electronic device to control charging of its battery Ex. 5, pp. 1, 34
• Independent Claim 11 recites a similar power supply system, framed with an "input signal" and an "output signal," comprising:
  • power circuitry configured to provide direct current power; and
  • data circuitry configured to provide an "output signal" to be sent to a portable electronic device and to receive an "input signal" that originates from a portable electronic device Compl. Ex. 5, p. 39
• The complaint reserves the right to modify its infringement description based on information obtained during discovery (Compl. ¶28).

U.S. Patent No. 10,951,042 - Power Supply Systems

• Patent Identification: U.S. Patent No. 10,951,042, entitled “Power Supply Systems,” issued March 16, 2021 Compl. ¶18
• Technology Synopsis: This patent is also directed to intelligent charging systems. The claims appear to be focused on the portable electronic device side of the transaction, rather than the power supply. The alleged infringement is based on the device's compliance with the Battery Charging (BC) 1.2 specification, which involves the device providing a signal to and receiving a signal from a power supply to determine the appropriate power level (Compl. ¶¶13-14; Compl. ¶37).
• Asserted Claims: Independent claims 1 and 11, and dependent claims 2, 5-6, 8, 12, 15-16, and 18 Compl. ¶36
• Accused Features: The complaint alleges that Defendant’s portable electronic devices, such as notebooks and mobile workstations, which comply with the BC 1.2 specification, infringe the '042 patent Compl. ¶37

III. The Accused Instrumentality

Product Identification

The accused instrumentalities include a wide range of MSI products, including notebooks (e.g., PS63 Modern series, Creator series, Stealth series), mobile workstations, monitors, motherboards, an all-in-one PC, and power supplies like the MSI USB-C Docking Station Gen 2 Compl. ¶20 Compl. ¶27 Ex. 5, p. 1

Functionality and Market Context

• The complaint alleges that these products infringe by implementing standardized charging protocols, specifically the USB Battery Charging (BC) 1.2 specification, the USB Power Delivery (PD) Specification, and the Quick Charge 3.0 Standard (Compl. ¶¶21, 28-30).
• The complaint provides visual evidence from MSI's marketing materials and product specifications to support these allegations. For instance, a specification sheet for the MSI USB-C Docking Station Gen 2 explicitly lists "BC1.2 5V/1.5A" for one of its USB ports Ex. 5, p. 2 Another product page for the PS63 Modern laptop advertises "QC 3.0 quick charge" and notes it was "Tested by Qualcomm® Technology BC1.2" Ex. 5, p. 3 These documents are used to allege that the products are designed to perform the patented "handshake" to negotiate power levels.

IV. Analysis of Infringement Allegations

The complaint references Exhibit 4 for its infringement theory of the '187 patent, but this exhibit was not provided. Therefore, a claim chart summary cannot be constructed for the '187 patent. The narrative theory alleges that products complying with the BC 1.2 specification infringe claims 1-2 and 7-9 of the '187 patent Compl. ¶21

10,855,087 Infringement Allegations

The complaint does not provide specific citations to the '087 patent's specification to support its infringement contentions for each claim element. The following chart is based on the allegations in Exhibit 5, which is incorporated by reference in the complaint (Compl. ¶28).

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A power supply system comprising: [1.1] power circuitry configured to provide direct current power;	Defendant’s accused USB power supplies (notebooks, docking stations) contain power circuitry that provides direct current power to portable electronic devices via their USB ports (Compl. ¶28; Ex. 5, pp. 1-10).	¶28	Not Provided
and [1.2] data circuitry configured to receive a first signal that originates from a portable electronic device and to provide a second signal to be sent to the portable electronic device...	The accused products implement the USB BC 1.2 specification, which uses the D+ and D- data lines for communication. The data circuitry receives a D+ signal ("first signal") from the portable device and provides a D- signal ("second signal") to it to detect the type of power supply Ex. 5, p. 11	¶28	Not Provided
wherein the data circuitry is further configured, in coordination with the first signal, to provide the second signal, the second signal having a parameter level that is usable by the portable electronic device in connection with control of charging a rechargeable battery...	In the BC 1.2 protocol, the power supply shorts the D+ and D- lines. The portable device detects the resulting voltage on the D- line (the "parameter level") to determine the type of power supply (e.g., charging port) and control its battery charging accordingly Ex. 5, pp. 34-35	¶28	Not Provided

• Identified Points of Contention:
  • Scope Questions: The complaint asserts infringement for some elements under the doctrine of equivalents, raising the question of whether the claim language literally covers the accused functionality Ex. 5, p. 16 A key dispute may be whether a claim requiring the circuitry "to provide a second signal" can read on a system where the power supply shorts the D+ and D- lines, and the portable device simply detects the resulting voltage. Defendant may argue this is a passive detection mechanism, not the active provision of a "second signal" as claimed.
  • Technical Questions: A central technical question is whether the signaling protocols of industry standards like BC 1.2, USB-PD, and QC 3.0 are functionally identical to the specific multi-conductor handshake method described in the patent. For example, do the voltage levels and detection sequences in the standards perform the same function in substantially the same way to achieve the same result as the claimed invention?

V. Key Claim Terms for Construction

• The Term: "data circuitry configured to receive a first signal . . . and to provide a second signal" '087 Patent, Claim 1

  • Context and Importance: This term is the core of the claimed "handshake." Its construction will determine whether the bidirectional or responsive signaling used in modern standards (e.g., USB-PD, BC 1.2) falls within the scope of claims that describe a "first signal" and a "second signal." Practitioners may focus on this term because the accused products use standardized, often bidirectional, communication protocols that may not map directly onto a claim structure seemingly describing two distinct, unidirectional signals.
  • Intrinsic Evidence for Interpretation: The full '087 patent is available in the record, and the parties may present the following types of arguments drawn from its claims and specification:
    • Evidence for a Broader Interpretation: Plaintiff may argue that "provide a second signal" should be interpreted broadly to include any response coordinated with the first signal that communicates information, such as creating a specific voltage on a data line for the device to detect Ex. 5, p. 34
    • Evidence for a Narrower Interpretation: Defendant may argue that the claim language implies two separate actions—receiving and providing—and that the specification's description of distinct third and fourth conductors supports an interpretation requiring separate signal paths, which may not be present in the accused standards-based systems Compl. ¶14

• The Term: "parameter level" '087 Patent, Claim 1

  • Context and Importance: The definition of this term is critical for determining what kind of information must be conveyed by the "second signal." The infringement analysis depends on whether a simple voltage level, as detected in the BC 1.2 protocol, qualifies as a "parameter level" used to "control" charging.
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: Plaintiff may argue that any detectable signal characteristic, such as a specific voltage, that the portable device uses to make a charging decision constitutes a "parameter level" Ex. 5, p. 37
    • Evidence for a Narrower Interpretation: Defendant may argue that the term implies a more complex or encoded value than a simple voltage detection, potentially pointing to specific embodiments or language in the patent's detailed description that suggests a more sophisticated data exchange '087 Patent, Claim 1

VI. Other Allegations

• Indirect Infringement: The complaint alleges inducement by asserting that Defendant advertised and provided instructions for using its products in a manner that necessarily infringes (e.g., by complying with the BC 1.2 standard), with knowledge of the patents from a July 2022 notice letter Compl. ¶¶22-23 Compl. ¶¶31-32 It alleges contributory infringement by claiming the accused functionalities are a material part of the invention and not a staple article of commerce suitable for substantially non-infringing use Compl. ¶24 Compl. ¶33
• Willful Infringement: Willfulness is alleged based on Defendant’s continued infringing conduct after receiving the July 21, 2022 notice letter, which the complaint states included claim charts demonstrating infringement Compl. ¶26 Compl. ¶35 Compl. ¶42 Plaintiff asserts this conduct constitutes an unjustifiably high risk of infringement.

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

• A central issue will be one of standards-based infringement: does the implementation of ubiquitous industry standards like USB Battery Charging 1.2 and USB Power Delivery necessarily practice the specific signaling methods claimed by the patents, or do the standards operate in a technically distinct, non-infringing manner?
• A key question of claim scope will be whether terms requiring a "first signal" and a "second signal" can be construed to cover the responsive or bidirectional signaling protocols used in modern charging standards, especially where the complaint relies on the doctrine of equivalents for certain infringement theories.
• An important evidentiary question for damages will be willfulness: did Defendant's continued sale of products incorporating common charging standards, after receiving a detailed notice letter, constitute objective recklessness sufficient to support a finding of willful infringement and potential enhanced damages?