ECR4Kids v. dbest Products: Collapsible Cart Patent Action Dismissed Without Prejudice
ECR4Kids, LP brought a patent infringement action against dbest products, Inc. in the Central District of California, asserting US11338835B2 covering high load capacity collapsible carts. The court dismissed all four claims without prejudice — the first three for lack of jurisdiction — closing the case in just 103 days without a merits ruling.
Jurisdictional hurdle ends ECR4Kids’ collapsible cart infringement claim
ECR4Kids, LP filed this infringement action on 30 May 2024 in the United States District Court for the Central District of California, naming dbest products, Inc. as defendant. The case centred on US11338835B2, a patent covering high load capacity collapsible carts — a product category with meaningful commercial competition in consumer and institutional supply markets. ECR4Kids sought relief across four distinct claims arising from dbest’s alleged infringement of that patent.
The case closed on 10 September 2024, 103 days after filing, following the court’s ruling on dbest’s Motion to Dismiss. The court found that ECR4Kids’ first three claims lacked jurisdiction and dismissed them without prejudice. The court then declined to exercise supplemental jurisdiction over the fourth claim — a state-law or non-federal claim that depended on the federal claims for its jurisdictional hook — and dismissed it without prejudice as well. The judgment confirmed that ECR4Kids shall take nothing from this action.
The rapid resolution — under four months — suggests that jurisdictional defects were identifiable early in the pleadings, consistent with dbest filing a motion to dismiss rather than answering on the merits. Because all dismissals were without prejudice, ECR4Kids retains the theoretical ability to refile with corrected jurisdictional standing, though the public record does not reveal whether it intends to do so. The underlying question of whether dbest’s collapsible carts infringe US11338835B2 remains unanswered.
Filing to Dismissed without Prejudice in 103 days
103 days — resolved faster than the median patent case lifecycle in C.D. Cal.
All claims dismissed without prejudice: what this ruling means for both parties
Dismissal without prejudice: no merits ruling, door stays open
A dismissal without prejudice terminates the current action but does not bar the plaintiff from refiling. Here, the court granted dbest’s Motion to Dismiss on jurisdictional grounds — meaning it never assessed whether US11338835B2 was actually infringed. The fourth claim fell as a consequence, as courts typically decline supplemental jurisdiction when all federal anchoring claims are dismissed.
Rule 12(b)(1) / No merits reachedECR4Kids loses this round but retains refiling rights
Because dismissal was without prejudice, ECR4Kids is not barred from bringing a new action once any jurisdictional deficiencies are cured. The patent US11338835B2 remains in force and has not been adjudicated invalid or not-infringed. However, refiling requires addressing the specific jurisdictional defects identified by the court, and the litigation clock would reset.
Patent survives; refile possibledbest wins dismissal but faces potential renewed action
dbest products secured dismissal of all four claims without any finding on the merits, avoiding a damages or injunction ruling at this stage. This outcome does not constitute a declaration of non-infringement. The without-prejudice nature means dbest cannot treat the matter as permanently closed — a corrected refile by ECR4Kids is legally permissible and would restart the dispute.
No liability finding; exposure persistsCollapsible cart market: infringement question unresolved
Competitors and retailers in the collapsible cart segment should note that US11338835B2 has not been tested on the merits. The patent remains an active enforcement risk. Companies designing or sourcing high load capacity collapsible carts should monitor any refile by ECR4Kids and consider whether their own products fall within the scope of the asserted claims before the dispute is renewed.
Active patent; sector risk remainsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Ecr4kids, LP | Company | Consumer furniture and educational products maker — holder of US11338835B2Search in Eureka ↗ |
| Defendant | dbest products, Inc. | Company | dbest products, Inc. — manufacturer and retailer of collapsible carts and storage solutionsSearch in Eureka ↗ |
| Plaintiff counsel | David Joshua Staub | Attorney | Counsel for Ecr4kids, LPSearch in Eureka ↗ |
| Plaintiff counsel | Nicholas Matthew Zovko | Attorney | Counsel for Ecr4kids, LPSearch in Eureka ↗ |
| Plaintiff counsel | Norman Elliot Lehrer | Attorney | Counsel for Ecr4kids, LPSearch in Eureka ↗ |
| Plaintiff law firm | DiMarino Lehrer and Collazo PC | Law Firm | Representing Ecr4kids, LPSearch in Eureka ↗ |
| Plaintiff law firm | Knobbe, Martens, Olson & Bear LLP | Law Firm | Representing Ecr4kids, LPSearch in Eureka ↗ |
| Plaintiff law firm | Law Office of D.Joshua Staub | Law Firm | Representing Ecr4kids, LPSearch in Eureka ↗ |
| Defendant counsel | Ehab M. Samuel | Attorney | Counsel for dbest products, Inc.Search in Eureka ↗ |
| Defendant counsel | Nancy J. Mertzel | Attorney | Counsel for dbest products, Inc.Search in Eureka ↗ |
| Defendant law firm | Mertzel Law PLLC | Law Firm | Representing dbest products, Inc.Search in Eureka ↗ |
| Defendant law firm | Orbit IP LLP | Law Firm | Representing dbest products, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | California Central District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s judgment reflects a purely jurisdictional outcome: the first three claims were dismissed for lack of jurisdiction following a successful Motion to Dismiss, and the fourth claim — likely a state-law count — was dismissed after the court declined to exercise supplemental jurisdiction under 28 U.S.C. § 1367. The phrase ‘Plaintiff shall take nothing’ is a standard judgment formulation confirming no relief was awarded, but it carries no implication of a merits finding on infringement, validity, or damages. Both parties emerge without a definitive ruling on US11338835B2.
US11338835B2 — High Load Capacity Collapsible Cart Technology
US11338835B2, filed under application number US17/143116, protects innovations in high load capacity collapsible cart design. Collapsible carts of this type are used across consumer, educational, and institutional markets for transporting heavy or bulky loads. The patent’s claims likely address structural mechanisms that enable both collapsibility and load-bearing integrity — a technically non-trivial combination that differentiates premium products in a crowded segment. The patent is held by ECR4Kids, LP, a supplier known for educational and commercial furnishings.
In a market where collapsible carts are sold by numerous manufacturers at varying price points, design patents and utility patents covering load-bearing structures carry significant commercial weight. US11338835B2 has not been subject to IPR or a merits-level court ruling, meaning its claims remain presumptively valid and their full scope is legally untested. Competing manufacturers — particularly those whose products feature high load ratings and folding frame mechanisms — face genuine FTO risk until the patent is either invalidated or its claims are construed by a court.
Should you run an FTO against US11338835B2?
Any company designing, manufacturing, importing, or retailing high load capacity collapsible carts in the US market should treat US11338835B2 as a live clearance concern. The patent survived this litigation intact — no invalidity finding, no non-infringement ruling. ECR4Kids retains enforcement rights and the litigation record suggests it is willing to assert them. Product teams planning new cart SKUs with fold-flat or collapsible load-bearing frames should review claim scope before launch.
PatSnap Eureka’s FTO Search Agent can map the claims of US11338835B2 against your product specifications and surface prior art that may support design-around strategies or validity challenges. Eureka also monitors for continuation filings and related applications in ECR4Kids’ portfolio, alerting your team if new claims emerge that extend the patent family’s reach into adjacent product categories.
Run a freedom-to-operate analysis on US11338835B2 to assess your product’s exposure
Run FTO in Eureka →Similar Collapsible Cart and Consumer Product Patent Cases in C.D. Cal.
Cases involving collapsible cart and structural consumer product patents in the Central District of California — mapped by outcome, jurisdictional posture, and patent scope.
What this case signals for the collapsible cart and material handling IP landscape
A jurisdictional dismissal without prejudice leaves the underlying patent enforcement question open — and the market exposed.
US11338835B2 is untested on the merits and remains enforceable
The court never ruled on validity or infringement. ECR4Kids retains the patent and the right to refile. Any company selling competing high load capacity collapsible carts should treat this patent as an active risk and conduct an FTO review before expanding product lines.
Jurisdictional dismissals often precede corrected refiles — monitor the docket
In C.D. Cal., plaintiffs who receive without-prejudice dismissals on standing or jurisdictional grounds frequently refile with amended complaints. dbest and similarly positioned defendants in the collapsible cart space should track ECR4Kids’ docket activity for a renewed action.
Ecr4kids v dbest — key questions answered
The court granted dbest’s Motion to Dismiss, finding that ECR4Kids’ first three claims lacked jurisdiction. The court then declined to exercise supplemental jurisdiction over the fourth claim. All dismissals were without prejudice, meaning no merits ruling was made on infringement of US11338835B2.
Yes. A dismissal without prejudice does not bar refiling. ECR4Kids would need to cure the jurisdictional defects identified by the court in its Motion to Dismiss ruling. The patent US11338835B2 remains in force and the underlying infringement question has not been adjudicated.
The case involves US11338835B2, filed under application US17/143116. The patent covers high load capacity collapsible carts — a structural utility patent in the consumer and institutional cart market held by ECR4Kids, LP.
No. The dismissal was on jurisdictional grounds, not on the merits. The court made no finding regarding infringement, validity, or claim construction of US11338835B2. dbest did not receive a declaration of non-infringement.
When a federal court dismisses the federal claims anchoring a case, it may decline to hear any remaining state-law claims under 28 U.S.C. § 1367. Here, after the first three claims were dismissed for lack of jurisdiction, the court declined supplemental jurisdiction over the fourth claim and dismissed it without prejudice as well.
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