Changsha Wanweixin v. MedInfo Inc: Foldable Clipboard Patent Dismissed With Prejudice
Changsha Wanweixin Trading Co. and co-plaintiff Tengfei Huang filed a patent infringement action against MedInfo Inc in Colorado federal court, asserting US12036812B2 covering a foldable clipboard design. The case was voluntarily dismissed with prejudice just 88 days after filing — a timeline consistent with an early settlement or licensing resolution reached before full litigation commenced.
Foldable Clipboard Patent Suit Ends Swiftly in Colorado Federal Court
On 26 August 2024, Changsha Wanweixin Trading Co., Ltd. and individual co-plaintiff Tengfei Huang filed a patent infringement action in the U.S. District Court for the District of Colorado against MedInfo Inc, docket number 1:24-cv-02357. The asserted patent, US12036812B2 (application number US17/967610), covers a foldable clipboard product. Plaintiff counsel from Glacier Law LLP, a firm that frequently represents Chinese consumer goods patent holders in U.S. federal court, led the action, while MedInfo retained Sheridan Ross PC.
The case closed on 22 November 2024 — just 88 days after filing — when the plaintiffs filed a notice of voluntary dismissal with prejudice pursuant to Fed. R. Civ. P. 41(a)(1)(A)(i). A dismissal with prejudice is a final adjudication on the merits as a matter of law: the plaintiffs are permanently barred from reasserting the same patent claims against MedInfo Inc. Because Rule 41(a)(1)(A)(i) allows dismissal by notice before the defendant has answered or moved for summary judgment, the court’s involvement was minimal and no merits ruling was issued.
The 88-day resolution is notably swift even by the standard of early-terminating patent cases, suggesting the parties may have reached a licensing agreement, settlement, or some commercial arrangement shortly after service. The public record is silent on the specific terms driving the dismissal. What remains unknown is whether any financial consideration changed hands or whether MedInfo agreed to cease selling the accused foldable clipboard product — factors that would substantially alter the commercial significance of this outcome for either side.
Filing to Voluntary dismissal in 88 days
88 days — resolved well before the typical 2–3 year district court patent litigation cycle
Voluntarily dismissed with prejudice: what this ruling means for both parties
Rule 41(a)(1)(A)(i): plaintiff-initiated dismissal without court order
Under Fed. R. Civ. P. 41(a)(1)(A)(i), a plaintiff may dismiss an action as of right by filing a notice before the opposing party serves an answer or a motion for summary judgment. No court approval is required. Here, the plaintiffs added ‘with prejudice’ — converting a procedural exit into a permanent bar. The court played no substantive role; the dismissal is self-executing upon filing.
Procedural dismissal — no merits rulingWith prejudice: plaintiffs are permanently barred from re-suing MedInfo
A voluntary dismissal ‘with prejudice’ carries the same legal force as a judgment on the merits under res judicata doctrine. Changsha Wanweixin and Tengfei Huang cannot bring a new action against MedInfo Inc on the same patent claims arising from the same accused product. This is a materially stronger concession than a without-prejudice dismissal, and is frequently the quid pro quo in a confidential settlement where the defendant demands finality.
Permanent bar on re-filingMedInfo exits with no liability finding — and full finality
MedInfo Inc secures a permanent release from this specific infringement claim without any court-adjudicated finding of liability. Represented by Sheridan Ross PC, the defendant achieved resolution before an answer was even required. If a settlement was reached, MedInfo likely negotiated the with-prejudice condition to eliminate litigation tail risk. However, the patent itself — US12036812B2 — remains valid and enforceable against other parties.
No liability — case fully closedPatent survives: other clipboard product sellers remain exposed
The dismissal resolves only the dispute with MedInfo. US12036812B2 is still live and enforceable, and Glacier Law LLP has a demonstrated pattern of asserting Chinese consumer goods patents in U.S. federal courts. Other sellers or importers of foldable clipboard products should treat this case as a signal that the patent holder is actively monitoring the market and willing to litigate — even if this particular action resolved quickly.
Patent remains active and enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Changsha Wanweixin Trading Co., Ltd. | Company | Consumer goods patent holder — asserting US12036812B2 covering a foldable clipboardSearch in Eureka ↗ |
| Co-Plaintiff | Tengfei Huang | Individual | Search in Eureka ↗ |
| Defendant | MedInfo Inc | Company | MedInfo Inc — accused of infringing foldable clipboard patent US12036812B2Search in Eureka ↗ |
| Plaintiff counsel | Tao Liu | Attorney | Counsel for Changsha Wanweixin Trading Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Wei Wang | Attorney | Counsel for Changsha Wanweixin Trading Co., Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Glacier Law LLP | Law Firm | Representing Changsha Wanweixin Trading Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Brian Scott Boerman | Attorney | Counsel for MedInfo IncSearch in Eureka ↗ |
| Defendant law firm | Sheridan Ross PC | Law Firm | Representing MedInfo IncSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Colorado District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1)(A)(i) — a plaintiff’s unilateral right to exit before the defendant answers — and explicitly appends ‘with prejudice.’ This phrasing is legally significant: it converts a procedural withdrawal into a final merits bar under res judicata, precluding any future action by these plaintiffs against MedInfo on the same claims. No court order or findings accompanied the filing, so the record provides no indication of the underlying commercial terms or whether MedInfo admitted or denied any infringement.
US12036812B2 — Foldable Clipboard Design and Construction
US12036812B2, filed under application number US17/967610, covers a foldable clipboard design — a product category that has seen growing patent activity as consumer goods manufacturers seek U.S. intellectual property protection for functional design innovations in everyday office and medical accessories. The patent is held by Tengfei Huang and commercialised through Changsha Wanweixin Trading Co., Ltd., a Chinese trading entity. The patent’s designation as a granted U.S. utility or design patent means it carries full enforceability in U.S. federal courts against importers and distributors.
From a competitive standpoint, US12036812B2 represents a calculated enforcement asset in a fragmented product category where numerous Chinese and domestic manufacturers supply clipboard products to U.S. retail and healthcare markets. The patent holder’s willingness to file in Colorado federal court and quickly reach resolution with MedInfo — a distributor or seller in this space — suggests an active monetisation strategy. For competitors, the key strategic question is whether their specific clipboard product designs fall within the scope of the asserted claims, particularly any features related to the folding mechanism or structural form factor.
Should you run an FTO against US12036812B2?
Any company importing, distributing, or retailing foldable clipboard products in the United States should assess its exposure to US12036812B2. This is particularly relevant for Amazon marketplace sellers, medical supply distributors, and office products wholesalers whose SKUs include collapsible or multi-panel clipboard designs. The patent holder has demonstrated a readiness to file federal litigation, and the rapid with-prejudice dismissal against MedInfo Inc suggests an established enforcement workflow. Identifying design-arounds or claim non-overlap early is materially cheaper than defending a Colorado federal court action.
PatSnap Eureka’s FTO Search Agent can map the claims of US12036812B2 against your product specifications and generate a prioritised risk report, surfacing both prior art that may bear on claim validity and competing patents in the clipboard and portable writing surface category. Eureka’s citation graph also allows you to identify whether continuation or divisional applications from the US17/967610 family are pending — a critical check before any product launch or catalogue expansion in this space.
Run a freedom-to-operate analysis on US12036812B2 to assess your product’s exposure
Run FTO in Eureka →Similar Foldable Clipboard and Consumer Goods Patent Cases in U.S. Federal Courts
Cases involving Chinese consumer goods patent holders asserting design and utility patents in U.S. district courts, resolved via early voluntary dismissal with prejudice.
What this case signals for the foldable clipboard and consumer goods IP landscape
An 88-day with-prejudice dismissal in a consumer goods patent case is rarely coincidental — it typically reflects a rapid commercial resolution.
Speed of resolution suggests early commercial agreement, not capitulation
Cases dismissed with prejudice in under 90 days typically indicate that parties reached a licensing deal, settlement payment, or product discontinuation agreement almost immediately after the complaint was served. The choice of ‘with prejudice’ suggests MedInfo demanded finality in exchange for whatever terms were agreed — a standard feature of early-stage patent settlements in consumer goods disputes.
Glacier Law LLP enforcement pattern warrants monitoring by clipboard product sellers
Glacier Law LLP is a known representative of Chinese consumer goods patent holders pursuing U.S. enforcement actions. Companies importing or distributing foldable clipboard products should monitor the litigation activity of Changsha Wanweixin and Tengfei Huang, as rapid resolution with one defendant does not preclude serial enforcement actions against others asserting the same patent.
Changsha v MedInfo — key questions answered
It means the plaintiffs — Changsha Wanweixin Trading Co. and Tengfei Huang — permanently relinquished their infringement claims against MedInfo Inc. Under res judicata, they cannot refile the same patent claims against MedInfo in any U.S. court. The patent US12036812B2 itself remains valid and enforceable against all other parties.
The public record does not confirm a settlement. However, the combination of an 88-day resolution and a with-prejudice dismissal is strongly consistent with a confidential settlement or licensing agreement. The with-prejudice condition is a standard defendant demand in exchange for any financial consideration. No settlement terms were filed publicly.
The patent at issue is US12036812B2, filed under U.S. application number US17/967610. It covers a foldable clipboard design. The patent is held by Tengfei Huang and asserted through co-plaintiff Changsha Wanweixin Trading Co., Ltd., a Chinese trading company.
A dismissal without prejudice allows the plaintiff to refile the same claims at a future date, subject to any applicable statute of limitations. A dismissal with prejudice is final and bars refiling — it has the same legal effect as a judgment on the merits. In this case, the plaintiffs chose with prejudice, permanently ending their claims against MedInfo Inc on patent US12036812B2.
No. The dismissal only resolves the dispute between the specific plaintiffs and MedInfo Inc. US12036812B2 remains in force and can be asserted against any other party whose products allegedly infringe its claims. Other importers, distributors, or sellers of foldable clipboard products in the U.S. market remain potentially exposed and should conduct their own freedom-to-operate analysis.
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