Electrasense Technologies v. Schedule A Defendants: Smart Socket Patent Dismissed
Electrasense Technologies, LLC asserted US9812876B2 — covering smart wall sockets incorporating power converter and load detection circuits — against a class of unnamed online marketplace defendants in the Northern District of Illinois. The case closed after just 109 days when Electrasense filed a voluntary dismissal without prejudice before any defendant had answered.
Schedule A e-commerce enforcement: smart socket IP dropped before defendants responded
On 9 December 2024, Electrasense Technologies, LLC filed a patent infringement action in the U.S. District Court for the Northern District of Illinois (Case No. 1:24-cv-12602), presided over by Judge John F. Kness. The complaint asserted US9812876B2, which covers wall sockets integrating a socket housing, output terminal, power converter circuit, and load detection circuit. The defendants were identified collectively as unnamed partnerships and unincorporated associations listed in a Schedule A — a litigation format commonly used in e-commerce IP enforcement targeting online marketplace sellers.
The case closed on 28 March 2025 when Electrasense filed a voluntary notice of dismissal without prejudice under Fed. R. Civ. P. 41(a)(1)(A)(i). Because no defendant had yet filed an answer or motion for summary judgment, Electrasense was entitled to dismiss as of right without court approval. The without-prejudice designation means the claims were not decided on their merits and Electrasense retains the legal ability to refile the same infringement allegations against the same or different defendants at a future date.
A lifespan of 109 days — from filing to closure — without a single defendant appearing on the record is consistent with outcomes seen in Schedule A cases where early-stage settlement, platform takedowns, or asset freezes resolve the commercial dispute before formal litigation proceeds. The precise terms of any resolution are not reflected in the public docket. What remains unknown is whether Electrasense obtained injunctive or monetary relief through parallel proceedings, or whether it intends to reassert the patent against new targets.
Filing to Voluntary dismissal in 109 days
109 days — resolved before defendants filed any response, suggesting early-stage resolution
Voluntarily dismissed: what the without-prejudice filing means for both sides
Rule 41(a)(1)(A)(i): dismissal as of right, no court approval needed
Fed. R. Civ. P. 41(a)(1)(A)(i) permits a plaintiff to dismiss an action without a court order by filing a notice before the opposing party has served an answer or motion for summary judgment. Electrasense exercised this right after 109 days. Because no defendants appeared, the dismissal took effect automatically upon filing. This procedural path imposes no judicial scrutiny on the reasons for withdrawal.
Voluntary dismissal — no merits rulingWithout prejudice confirmed — but terms of resolution are not public
The notice expressly states dismissal is WITHOUT PREJUDICE, meaning the claims were not extinguished. Electrasense retains the right to refile US9812876B2 infringement claims against these or other defendants. However, the public docket is silent on whether any side agreement, settlement, platform removal, or asset freeze preceded this filing. Practitioners should not infer that no commercial resolution occurred — only that none is on the public record.
Refiling rights preservedUnnamed sellers face latent re-exposure under active patent
Because the dismissal is without prejudice and US9812876B2 remains in force, Schedule A defendants — and any new sellers of substantially similar smart wall socket products — remain exposed to a future action. The absence of a merits ruling provides no invalidity or non-infringement shield. Sellers who did not formally settle or obtain a covenant not to sue should treat the patent as an ongoing commercial risk.
No merits immunity for defendantsSchedule A enforcement model: speed and leverage, not courtroom verdicts
This case follows a pattern typical of Schedule A e-commerce IP enforcement in N.D. Illinois — a TRO or preliminary injunction may have been sought to freeze seller accounts or seize assets early, with the lawsuit itself serving as leverage. Closure in under four months without any defendant response suggests the commercial objectives of the action were achieved outside formal adjudication. Smart socket and IoT accessory sellers on major online platforms should monitor Electrasense’s filing activity closely.
E-commerce IP enforcement patternFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Electrasense Technologies, LLC | Company | Smart power socket IP licensor — holder of US9812876B2 covering load-detecting wall socket circuitsSearch in Eureka ↗ |
| Defendant | The Partnerships and Unincorporated Associations identified in Schedule A | Individual | Unnamed e-commerce sellers (Schedule A) alleged to sell infringing smart wall socket productsSearch in Eureka ↗ |
| Plaintiff counsel | Hao Ni | Attorney | Counsel for Electrasense Technologies, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Stevenson Moore | Attorney | Counsel for Electrasense Technologies, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Ni Law Firm PLLC | Law Firm | Representing Electrasense Technologies, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Ni, Wang & Massand, PLLC | Law Firm | Representing Electrasense Technologies, LLCSearch in Eureka ↗ |
| Presiding judge | Judge John F. Kness | Judge | Illinois Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1)(A)(i) and explicitly designates the action as WITHOUT PREJUDICE. This phrasing confirms that no adjudication on infringement, validity, or damages occurred, and that the plaintiff’s claims survive intact. The fact that defendants had not yet answered — a prerequisite for this dismissal route — indicates the case closed at the earliest possible procedural stage, leaving the full merits of US9812876B2 unresolved for all parties.
US9812876B2 — smart wall socket with integrated load detection circuit
US9812876B2 (application no. US15/000049) protects a wall socket architecture combining a socket housing, output terminal, power converter circuit, and a load detection circuit. The load detection circuit is the technically distinctive element — it enables the socket to sense whether a connected device is drawing power, supporting smart-switching, energy management, or safety-cutoff functionality. This type of integrated detection capability sits at the intersection of electrical safety hardware and IoT-enabled power management.
In a market where smart socket products from Asian e-commerce manufacturers have proliferated rapidly on platforms like Amazon, Temu, and AliExpress, a patent covering the functional combination of power conversion and load detection within a single socket housing carries significant commercial leverage. Competitors integrating similar circuits into plug-in adapters, smart power strips, or USB wall chargers with load-sensing features should assess whether their architectures are captured by the claim language. The patent’s enforcement in a Schedule A context suggests Electrasense is actively monitoring marketplace listings for infringing SKUs.
Should your smart socket product be cleared against US9812876B2?
Any R&D team developing or sourcing wall sockets, plug-in adapters, or smart power accessories that incorporate load detection or power-sensing circuits should conduct a freedom-to-operate analysis against US9812876B2 before product launch or platform listing. The patent’s combination claims — housing plus converter plus load detection — are broad enough to capture a range of commercial implementations, and the without-prejudice dismissal in this case signals ongoing enforcement intent by Electrasense.
PatSnap Eureka’s FTO Search Agent enables product and IP teams to map their circuit architectures against the claim language of US9812876B2, identify design-around options, and surface prior art that may bear on validity. Eureka can also flag related patents in the same priority family and track Electrasense’s filing activity across jurisdictions, providing continuous risk intelligence for IoT hardware commercialisation teams.
Run a freedom-to-operate analysis on US9812876B2 to assess your product’s exposure
Run FTO in Eureka →Similar Schedule A smart socket patent enforcement cases in N.D. Illinois
Browse related patent infringement actions asserting smart socket and IoT power accessory patents against Schedule A defendants in the Northern District of Illinois.
What this case signals for the smart socket and IoT accessories IP landscape
Electrasense’s rapid-close Schedule A action underscores how load-detection socket patents are being deployed as enforcement tools in e-commerce channels.
US9812876B2 remains active and unlitigated on the merits — exposure persists
No court has ruled on the validity or scope of US9812876B2. The voluntary dismissal without prejudice leaves the patent fully enforceable. Any company manufacturing or selling smart wall sockets with load detection circuits — particularly through online marketplaces — should treat this patent as a live infringement risk until expiry or a merits-based ruling.
N.D. Illinois Schedule A filings warrant proactive monitoring by IoT accessory sellers
The Northern District of Illinois is a favoured venue for Schedule A patent enforcement due to its established procedural framework for TROs and asset freezes against unnamed marketplace sellers. IoT hardware companies and their distributors operating on platforms such as Amazon or AliExpress should maintain active docket monitoring for Electrasense and related entities to detect re-filing early.
Electrasense v Partnerships — key questions answered
It means Electrasense withdrew the lawsuit of its own accord before any defendant responded, and did so without prejudice — preserving the right to refile the same US9812876B2 infringement claims in future. No court ruled on the merits, so neither validity nor infringement was adjudicated.
US9812876B2 covers a wall socket that integrates a socket housing, output terminal, power converter circuit, and a load detection circuit. The load detection element — sensing whether a device is actively drawing current — is the key technical differentiator relevant to smart socket and IoT power accessory products.
Schedule A filings are commonly used in N.D. Illinois IP enforcement to target multiple unnamed online marketplace sellers simultaneously. This structure allows plaintiffs to seek early TROs and asset freezes against anonymous seller accounts before defendants can dissipate assets, making it a commercially efficient enforcement tool against e-commerce infringers.
Yes. Because the dismissal was without prejudice, Electrasense retains the right to refile US9812876B2 infringement claims against the same Schedule A defendants or new targets. No covenant not to sue was recorded on the public docket, so defendants have no formal protection against a future action based on this patent.
The case (1:24-cv-12602) was filed in the U.S. District Court for the Northern District of Illinois and assigned to Judge John F. Kness. It was filed on 9 December 2024 and closed on 28 March 2025, a span of 109 days, without any defendant appearance on the public docket.
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