DCT
3:26-cv-03377
Ivani LLC v. Legrand North America LLC
Key Events
Complaint
Table of Contents
complaint Intelligence
I. Executive Summary and Procedural Information
- Parties & Counsel:
- Plaintiff: Ivani, LLC (Delaware)
- Defendant: Legrand North America, LLC (Delaware)
- Plaintiff’s Counsel: Hecht Partners LLP
- Case Identification: 3:26-cv-03377, N.D. Tex., 09/25/2026
- Venue Allegations: Venue is alleged to be proper based on Defendant maintaining a regular and established place of business in the Northern District of Texas, specifically an office in Richardson, Texas.
- Core Dispute: Plaintiff alleges that Defendant’s smart electrical switches, controllers, and associated kits infringe two patents related to configurable mesh networks for electrical switching systems.
- Technical Context: The technology involves systems for retrofitting existing building electrical infrastructure with "master" and "remote" smart switches that communicate wirelessly to control electrical loads, such as lights, without requiring new wiring.
- Key Procedural History: The complaint discloses a prior lawsuit involving the same patents filed on October 2, 2025, which was voluntarily dismissed by the plaintiff on March 31, 2026, purportedly with the assumption the matter would be resolved. The complaint also details an extensive history of business discussions between the parties dating back to 2015, including an instance where Plaintiff allegedly provided Defendant with the patent application for the '194 Patent for review.
Case Timeline
| Date | Event |
|---|---|
| 2014-01-27 | Earliest Priority Date for '194 and '824 Patents |
| 2015-06-04 | Plaintiff emails Defendant's VP regarding its utility patent filing |
| 2015-06-12 | Plaintiff sends '194 Patent application to Defendant |
| 2016-11-10 | Plaintiff and Defendant personnel attend "Eliot Event" in New York |
| 2017-07-25 | Plaintiff and Defendant meet to demonstrate Plaintiff's technology |
| 2017-10-12 | Plaintiff and Defendant meet at Defendant's international headquarters |
| 2017-12-12 | U.S. Patent No. 9,843,194 Issues |
| 2018-01-09 | Plaintiff and Defendant meet at the Consumer Electronics Show (CES) |
| 2018-03-13 | Plaintiff and Defendant meet at Defendant's Harrisburg, CT office |
| 2018-09-01 | Earliest alleged infringement date (LMRC-611MCC in brochure) |
| 2018-10-15 | Plaintiff provides demonstration kits to Defendant |
| 2019-09-17 | U.S. Patent No. 10,418,824 Issues |
| 2025-10-02 | Plaintiff files first infringement suit against Defendant |
| 2026-03-31 | Plaintiff voluntarily dismisses first suit without prejudice |
| 2026-09-25 | Complaint Filing Date |
II. Technology and Patent(s)-in-Suit Analysis
U.S. Patent No. 9,843,194 - "Configurable Mesh Network for an Electrical Switching System"
- Issued: December 12, 2017
The Invention Explained
- Problem Addressed: The patent describes the difficulty and expense of installing automated or multi-way lighting controls in existing buildings (retrofitting) due to the need for complex and costly new wiring ('194 Patent, col. 3:44-58). It also notes that many existing "smart" home devices are isolated and cannot communicate with each other, or they rely on a central hub and may continuously consume power, undermining energy savings ('194 Patent, col. 3:15-30).
- The Patented Solution: The invention proposes a system comprising a "master switch" and one or more "remote switches" ('194 Patent, abstract). The master switch replaces a conventional wall switch and contains a physical relay to control power to a load, along with a computer and a wireless radio ('194 Patent, col. 11:1-11). The remote switch, which can be battery-powered and placed anywhere, contains an activation object (e.g., a button) and a radio, but no physical power-switching relay ('194 Patent, col. 12:1-6). When a user activates the remote switch, it sends a wireless command through a mesh network to the master switch, which then uses its internal relay to turn the load on or off ('194 Patent, col. 12:7-15).
- Technical Importance: This system allows for the creation of flexible and automated electrical control systems, such as multi-way switching, in existing structures without the need for additional, expensive wiring ('194 Patent, abstract).
Key Claims at a Glance
- The complaint asserts infringement of at least Claim 1 Compl. ¶86
- Independent Claim 1 of the '194 Patent recites the essential elements of:
- A power control system for retrofitting.
- A "master switch" that includes: a first activation object, a physical switch to connect/disconnect a power source, a first computer to control the physical switch, and a first network communication system.
- A "remote switch" that includes: a second activation object and a second network communication system to provide instructions to the network.
- A key negative limitation on the remote switch: "and not comprising a physical switch configured to connect and disconnect an outlet to a power source".
- The complaint reserves the right to assert additional claims Compl. ¶61
U.S. Patent No. 10,418,824 - "Configurable Mesh Network for an Electrical Switching System"
- Issued: September 17, 2019
The Invention Explained
- Problem Addressed: As a continuation of the '194 Patent, the '824 Patent addresses the same technical problems related to the cost and inflexibility of traditional electrical wiring for implementing automated or multi-way control in buildings ('824 Patent, col. 3:48-61).
- The Patented Solution: The solution is materially the same as in the '194 Patent, describing a power control system built on a "master switch" with a physical relay and a "remote switch" that wirelessly commands the master switch ('824 Patent, col. 5:6-24). The components form a local network that enables automation without new wiring ('824 Patent, abstract; '824 Patent, Fig. 5).
- Technical Importance: The technology enables the modernization and automation of electrical systems in existing structures by creating a wireless control layer on top of the existing power infrastructure ('824 Patent, abstract).
Key Claims at a Glance
- The complaint asserts infringement of at least Claim 1 Compl. ¶100
- Independent Claim 1 of the '824 Patent recites the essential elements of:
- A power control system for retrofitting.
- A "master switch" comprising: a first activation object, a physical switch, a first computer to control the physical switch, and a first network communication system.
- A "remote switch" comprising: a second activation object and a second network communication system to provide instructions to the network.
- Notably, Claim 1 of the '824 Patent does not contain the negative limitation found in the '194 Patent regarding the remote switch lacking a physical power switch.
- The complaint reserves the right to assert additional claims Compl. ¶61
III. The Accused Instrumentality
Product Identification
- The complaint identifies several categories of accused products, including "Master Switch Products" (e.g., WNRL50, LMRC-611MCC), "Remote Switch Products" (e.g., WNRL23, LMSW Wireless Switches), and various "kits" that package master and remote switches together (e.g., WNRH10KIT) Compl. ¶30 Compl. ¶34 Compl. ¶36 Compl. ¶47 Compl. ¶49 Compl. ¶54
Functionality and Market Context
- The complaint alleges the accused "master switches" are designed to be installed like traditional wall switches and contain a physical relay for switching a connected load Compl. ¶25 Compl. ¶40 They are also alleged to include a computer, such as an Atmel SAM R21 microcontroller, with an integrated 2.4GHz wireless transceiver to receive commands from a network Compl. ¶¶26-27 The image provided in the complaint shows the internal components of an accused master switch, including the microcontroller and physical switch. Compl. p. 10
- The accused "remote switches" are described as battery-operated, wireless devices that are not wired to line-voltage power and do not contain a physical relay Compl. ¶32 Compl. ¶52 Their alleged function is to send wireless instructions to a paired master switch when a user activates a button Compl. ¶33 Compl. ¶53
- The complaint alleges Defendant markets these products to be used together to achieve "easy 3-way control," which suggests their commercial purpose is to function as a system Compl. ¶78 Compl. ¶92
IV. Analysis of Infringement Allegations
'194 Patent Infringement Allegations
| Claim Element (from Independent Claim 1) | Alleged Infringing Functionality | Complaint Citation | Patent Citation |
|---|---|---|---|
| a master switch configured to replace a traditional light-switch, the master switch comprising: a first activation object; | The accused WNRL50 master switch includes a paddle that functions as an activation object for a user. | ¶24 | col. 5:10-12 |
| a physical switch configured to connect and disconnect an outlet to a power source; | The WNRL50 is alleged to include an internal physical switch (relay) to connect and disconnect power to a load. | ¶25 | col. 11:7-11 |
| a first computer configured to control said physical switch; | The WNRL50 allegedly contains an Atmel SMART SAM R21 microcontroller that controls the physical switch. | ¶26 | col. 5:12-14 |
| and a first network communication system configured to receive instructions from a network ... | The microcontroller in the WNRL50 allegedly includes an integrated 2.4GHz ISM band transceiver for receiving wireless instructions. | ¶27 | col. 13:58-67 |
| a remote switch, the remote switch comprising: a second activation object; | The accused WNRL23 remote switch is a battery-operated device that includes a second activation object for a user to interact with. | ¶32 | col. 5:20-21 |
| and a second network communication system configured to provide instructions to said network; | The WNRL23 remote switch allegedly includes a network communication system to send instructions to a master switch upon activation. | ¶33 | col. 5:21-24 |
| and not comprising a physical switch configured to connect and disconnect an outlet to a power source; | The complaint alleges that remote switches like the LMSW Wireless Switches run on a coin-cell battery, are not wired to line-voltage, and do not include a physical switch to connect/disconnect an outlet. | ¶52 | col. 16:35-38 |
'824 Patent Infringement Allegations
| Claim Element (from Independent Claim 1) | Alleged Infringing Functionality | Complaint Citation | Patent Citation |
|---|---|---|---|
| a master switch comprising: a first activation object; | The accused master switches (e.g., LMRC-611MCC) include a "Load A" button that acts as a first activation object. | ¶39 | col. 10:11-12 |
| a physical switch; | The LMRC-611MCC is alleged to include a 10-amp relay that functions as a physical switch to control a load. | ¶40 | col. 10:12 |
| a first computer configured to control said physical switch; | The LMRC-611MCC allegedly contains a processor or microcontroller that controls the relay in response to local button presses and network instructions. | ¶42 | col. 10:13-14 |
| a first network communication system configured to receive instructions from a network... | The LMRC-611MCC is alleged to communicate over a 2.4 GHz 6LoWPAN wireless mesh network to receive instructions. | ¶41 | col. 10:14-17 |
| a remote switch comprising: a second activation object; | The accused remote switches (e.g., LMSW Wireless Switches) allegedly include one or more push buttons that serve as a second activation object. | ¶50 | col. 10:20-21 |
| and a second network communication system configured to provide instructions to said network; | The LMSW Wireless Switches allegedly include a network communication system ("Wireless IPv6 Mesh") to send instructions to an associated master switch. | ¶51 | col. 10:21-22 |
- Identified Points of Contention:
- System vs. Component Infringement: The complaint alleges direct infringement from the sale of "kits" containing both master and remote switches Compl. ¶85 A potential point of contention is whether Defendant's sale of a kit constitutes direct infringement of the system claims, or if infringement only occurs when a customer assembles and uses the system, shifting the focus to indirect infringement theories.
- Scope of "Network": The patents describe a "self-organizing" mesh network ('824 Patent, col. 10:27-28). The infringement analysis may turn on whether the accused products' use of protocols like Zigbee and 6LoWPAN Compl. ¶41 Compl. ¶56 meets the functional and structural requirements of the "network" as claimed.
- Claim Scope Variation: Claim 1 of the '194 Patent includes a negative limitation that the remote switch does not comprise a physical power switch. Claim 1 of the '824 Patent omits this limitation. This raises the question of whether this difference was a strategic choice during prosecution to capture a broader array of remote switch devices and how it will affect the infringement analysis for each patent.
V. Key Claim Terms for Construction
The Term: "computer"
Context and Importance: This term is foundational to the "smart" aspect of the invention. The complaint alleges that microcontrollers like the Atmel SAM R21 meet this limitation Compl. ¶26 Practitioners may focus on this term because Defendant could argue that a simple microcontroller does not rise to the level of a "computer" as contemplated by the patent, which also describes more advanced capabilities.
Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: The specification provides a broad definition, stating the term "is intended to be inclusive of all computational devices including, but not limited to: processing devices, microprocessors, personal computers..." ('824 Patent, col. 7:37-43). This language may support Plaintiff's position that a microcontroller is a "computer."
- Evidence for a Narrower Interpretation: Elsewhere, the specification describes the computer performing sophisticated functions like generating a map of switch locations and triangulating the position of users ('824 Patent, col. 19:54-20:17). This context may support an argument that the term should be limited to devices capable of such complex processing, not just basic control logic.
The Term: "network" (and "self-organizing network")
Context and Importance: The patents claim a system where switches communicate over a "network," which is described as being "self-organizing" ('824 Patent, Claim 10). The definition of this term is critical for determining if the wireless protocols used by the accused products (e.g., Zigbee, 6LoWPAN) fall within the scope of the claims.
Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: The patent describes the network's function as allowing master and remote switches to communicate and explicitly mentions Bluetooth Low Energy (BLE) as a suitable technology ('824 Patent, col. 19:37-40). This could suggest that any protocol enabling such communication qualifies.
- Evidence for a Narrower Interpretation: The repeated use of "self-organizing" and descriptions of a "mesh network" where devices can relay messages for each other ('824 Patent, col. 13:3-5; '824 Patent, Fig. 5) may support a narrower construction. A defendant could argue that a simple point-to-point pairing between two devices does not constitute the "self-organizing network" taught in the patent. The complaint itself provides a visual from the patent showing a multi-node mesh network, which may be used to argue for this narrower scope. ('824 Patent, Fig. 5).
VI. Other Allegations
- Indirect Infringement: The complaint alleges induced infringement, stating that Defendant’s specification sheets, installation manuals, and brochures instruct customers to pair the master and remote switches to create an infringing system for multi-way control Compl. ¶63 Compl. ¶88 It also pleads contributory infringement, alleging the remote and master switches are specially made for use in the patented invention and are not staple articles suitable for substantial non-infringing use Compl. ¶80 Compl. ¶84
- Willful Infringement: The complaint alleges a lengthy history of pre-suit knowledge. It claims Defendant was sent the '194 Patent application in June 2015, attended multiple meetings where the technology was discussed, and was aware the '194 Patent had issued by January 2018 Compl. ¶¶66-71 The complaint also references a prior lawsuit filed in October 2025, further supporting the allegation of knowledge Compl. ¶9
VII. Analyst’s Conclusion: Key Questions for the Case
- A central issue will be one of definitional scope: will the term "computer", as used in the patents, be construed broadly to encompass the simple microcontrollers found in the accused products, or will it be narrowed by specification examples of more complex processing, potentially placing the accused devices outside the claim scope?
- A key technical question will relate to the nature of the network: does the pairing of accused master and remote switches using standard wireless protocols like Zigbee constitute the "self-organizing network" described in the patents, or is there a fundamental mismatch in the claimed network's architecture and functionality versus the accused system's operation?
- A critical legal question will concern the theory of infringement: will Plaintiff succeed in proving direct infringement through the sale of "kits," or will the analysis shift to indirect infringement, requiring a more complex showing that Defendant's customers directly infringe and that Defendant possessed the requisite intent to induce or contribute to that infringement?
Analysis metadata