Simplismart LLC v. Wuhan Tiejinni Technology Co

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: SimpliSmart LLC (Delaware)
  • Defendant: Wuhan Tiejinni Technology Company d/b/a Slochi (China); Ningbo Meishan Bonded Port Maisilang Photoelectric Technology Co., Ltd. d/b/a Amico (China); and Amazon.com, Inc. (Delaware)
  • Plaintiff's Counsel: Garson, Segal, Steinmetz, Fladgate LLP
• Case Identification: 1:26-cv-00053, S.D.N.Y., 03/12/2026
• Venue Allegations: Plaintiff alleges venue is proper because Defendants are subject to personal jurisdiction in the district through sales and offers for sale to New York consumers, and that Amazon maintains a regular and established place of business in the district.
• Core Dispute: Plaintiff alleges that Defendants' multi-state, adjustable lighting products infringe patents related to systems and methods for controlling lighting characteristics by detecting momentary power interruptions from a standard wall switch.
• Technical Context: The technology enables "smart" lighting features, such as changing color temperature or brightness, using existing electrical wiring and switches, thereby eliminating the need for separate wireless hubs, mobile applications, or rewiring.
• Key Procedural History: The operative complaint is an Amended Complaint for Patent Infringement.

Case Timeline

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

U.S. Patent No. 10,448,477 - "Adjustable Lighting System"

• Patent Identification: U.S. Patent No. 10,448,477, "Adjustable Lighting System," issued October 15, 2019 Compl. ¶36

The Invention Explained

• Problem Addressed: The patent addresses the limitations of existing methods for adjusting home lighting, which often require special fixtures for 3-way bulbs, professional installation for dimmers, or technically complex setups involving RF remotes or Wi-Fi hubs that many consumers find inconvenient or difficult to use, especially for controlling multiple bulbs in unison Compl. ¶41 '477 Patent, col. 1:15-45
• The Patented Solution: The invention is a self-contained light bulb or fixture that uses "continuous wave modulation"-interpreting brief, user-generated toggles of a standard wall switch as control signals-to cycle through different lighting states, such as warm, cool, or different brightness levels '477 Patent, abstract '477 Patent, col. 2:31-46 An internal memory unit retains the last-used setting, so the light returns to its previous state when turned on after a normal power-off period '477 Patent, Fig. 1 This allows advanced control using only existing wiring and switches, without requiring hubs, remotes, or rewiring Compl. ¶40
• Technical Importance: The technology aimed to make adjustable lighting features more accessible and user-friendly by integrating control logic directly into the bulb and leveraging ubiquitous wall switches as the control interface, thereby lowering the barrier to adoption for non-technical consumers Compl. ¶40 '477 Patent, col. 2:6-9

Key Claims at a Glance

• The complaint asserts at least independent claim 1 and one or more of claims 1-17 Compl. ¶86
• Independent Claim 1 of the '477 Patent requires:
  • A light-emitting device with multiple light-emitting sub-elements and at least three different lighting states (distinguished by color temperature or brightness).
  • A circuit to detect a "First user control message," defined as a momentary power fluctuation from an On state, to an Off state, and back to the On state.
  • A circuit to detect a "Second user control message," defined as a different sequence of momentary power fluctuation from an Off state, to an On state, and back to the Off state.
  • A memory circuit that stores the lighting states and retains the current state during periods of power off.
• The complaint reserves the right to assert additional claims as discovery progresses Compl. ¶97

U.S. Patent No. 10,802,524 - "Adjustable Electronic Control System"

• Patent Identification: U.S. Patent No. 10,802,524, "Adjustable Electronic Control System," issued October 13, 2020 Compl. ¶37

The Invention Explained

• Problem Addressed: The patent identifies that control issues similar to those in lighting-such as requiring separate or complex controls for different operational states-also exist for other electrical devices like ceiling fans with multiple speeds '524 Patent, col. 2:16-24 Conventional solutions often require device-specific controls or modifications to wiring '524 Patent, col. 1:20-30
• The Patented Solution: The invention extends the concept from the '477 Patent to a broader "adjustable electronic control system" that can be applied to various electrical devices, not just lights '524 Patent, abstract It describes a circuit or module that detects sequences of momentary power fluctuations from a standard wall switch to change an operational state (e.g., cycle through fan speeds) or to trigger a reset to a default state '524 Patent, abstract
• Technical Importance: This approach provides a universal control methodology that allows existing, simple wall switches to manage multiple operational states for a variety of common electrical devices, creating enhanced functionality without altering the user's basic interaction with the switch '524 Patent, col. 2:46-51

Key Claims at a Glance

• The complaint asserts at least independent claims 1 and 13 Compl. ¶160
• Independent Claim 1 of the '524 Patent requires:
  • An electrical device with at least two different operational states, controlled by a switch.
  • Circuitry to detect a "First user message" (a sequence of momentary power fluctuations) that corresponds to a change in the operational state.
  • Circuitry to detect a "Second user message" (a different sequence of momentary power fluctuations) that corresponds to a "fixed Reset electrical operational state."
  • A memory circuit to store the current operational state and retain it during power-off periods.
• The complaint alleges infringement of "one or more claims of the '524 Patent" Compl. ¶151

III. The Accused Instrumentality

Product Identification

• The accused products are lighting products marketed under the "Slochi" and "Amico" brand names, including specific models such as the Slochi CL40A-8-WT and the Amico RD11-04-09-UC5-DN-WH Compl. ¶50 Compl. ¶83

Functionality and Market Context

• The complaint alleges the accused products are "self-contained lighting control systems" that enable users to toggle between different lighting states, including color temperatures and brightness levels, by using a standard wall switch Compl. ¶51
• The products are alleged to operate by detecting and responding to "momentary fluctuations in line voltage," or "power cycling," to interpret user commands Compl. ¶56
• They are also alleged to contain onboard memory circuitry to store multiple lighting states and recall the most recent state after power is turned off Compl. ¶58 A marketing image for an Amico product included in the complaint shows instructions to "Flip wall switch ON/OFF/ON within 8-10 seconds to change light mode" Compl. p. 19
• Plaintiff alleges the products are "low-cost imitations" that were created by deliberately reverse-engineering its patented systems and are sold through the Amazon.com marketplace Compl. ¶48 Compl. ¶49 Compl. ¶44

IV. Analysis of Infringement Allegations

10,448,477 Patent Infringement Allegations

10,802,524 Patent Infringement Allegations

Identified Points of Contention

• Scope Questions: A central question may be the scope of a "different sequence" of power fluctuations. The '477 Patent claims define the difference based on the starting state of the sequence (On vs. Off). The court may need to determine if this distinction is sufficient or if other differences, such as the duration of power interruption as described in the specification's embodiments, are implicitly required for the sequences to be considered "different."
• Technical Questions: The infringement analysis will likely require evidence of the accused products' internal circuitry and logic. A key factual question will be whether the accused devices can technically distinguish between the two different types of user-initiated power sequences as claimed, and whether they map those distinct sequences to different functions (e.g., "cycle state" versus "reset state") as required by the patents.

V. Key Claim Terms for Construction

The Term: "momentary fluctuations of power" (asserted in claims of both patents)

• Context and Importance: This term is the foundation of the patented control method. Its construction will define which user actions with a wall switch constitute an infringing control "message." The temporal scope of "momentary" is central to determining infringement.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification describes the inventive concept in general terms, such as a "momentary toggle of the light switch" and "simple On/Off transitions," which may support a construction covering any brief, user-initiated power cycle '477 Patent, col. 2:36-37 '477 Patent, col. 2:41
  • Evidence for a Narrower Interpretation: The specification also discloses specific embodiments with defined time windows, such as a "short power off pulse between 100 and 500 milliseconds" and a "long power off pulse between 500 and 1000 milliseconds" '477 Patent, col. 4:56-59 This language could support an argument that "momentary" is limited to such specified durations.

The Term: "fixed Reset electrical operational state" ('524 Patent, Claim 1)

• Context and Importance: This term is critical for the '524 Patent's infringement theory, as it defines the result of the "Second user message." The meaning of "fixed" will be important; specifically, whether it requires the device to return to a single, predetermined factory state or if it could be a user-defined "home" state.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The term "fixed" could be interpreted broadly to mean any state that is consistently returned to upon receiving the reset signal, regardless of the prior state.
  • Evidence for a Narrower Interpretation: The '477 Patent specification, incorporated by the '524 patent, describes a reset function that returns the device to an "initial state" or "State 0" after a specific sequence, suggesting a non-user-configurable, factory-default setting '477 Patent, col. 7:8-10 '477 Patent, col. 7:46-48 This may support a narrower construction of "fixed" as a predetermined initial state.

VI. Other Allegations

Indirect Infringement

• The complaint alleges both induced and contributory infringement Compl. ¶7
  • Inducement: Allegations are based on Defendants providing instructions on how to use the Accused Products in an infringing manner through product descriptions, images on Amazon, and user manuals Compl. ¶108 Compl. ¶135
  • Contributory Infringement: This is alleged on the basis that the Accused Products' control and memory circuitry constitute a material part of the patented inventions and that the products are not staple articles of commerce suitable for substantial non-infringing use, as their primary advertised function is the infringing multi-state operation Compl. ¶121-122

Willful Infringement

• The complaint alleges willful infringement based on Defendants' constructive notice of the patents since their issuance dates Compl. ¶101 Willfulness is also alleged based on Defendants' continued infringing conduct after receiving notice of the patents via the complaint Compl. ¶102 The complaint further alleges that Defendants deliberately copied and reverse-engineered Plaintiff's products Compl. ¶48 Compl. ¶54

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

• A core issue will be one of technical proof: can the Plaintiff demonstrate, through technical analysis of the accused products, that their internal logic is configured to detect and differentiate between two distinct sequences of power fluctuations (e.g., one starting from an "on" state and another from an "off" state) and to map those distinct sequences to separate functions as claimed?
• A key question of claim scope will be the definition of a "different sequence." The case may turn on whether the claimed difference in starting state (On vs. Off) is a legally sufficient distinction on its own, or if the patents require a more substantive technical difference, such as the signal's timing or duration, to distinguish between control messages.
• An important issue for the claims against Amazon will be one of knowledge and conduct: at what point did Amazon possess the requisite knowledge of infringement by its third-party sellers, and does its role in hosting product pages, processing payments, and fulfilling orders rise to the level of actively inducing or contributing to the alleged infringement?