Dbest Products v. Guangzhou Lincan: Portable Cart Patent Case Dismissed, Claims Consolidated
Dbest Products Inc. filed suit in the Central District of California against Guangzhou Lincan Electronic Technology Co., Ltd. for infringement of two portable cart patents. After 107 days, Dbest voluntarily dismissed the case without prejudice, redirecting all claims into the consolidated iBeauty Action — a broader dispute already pending in the same court.
Strategic consolidation drives swift exit in portable cart patent dispute
On 21 May 2025, Dbest Products Inc. filed a patent infringement action against Guangzhou Lincan Electronic Technology Co., Ltd. in the Central District of California (Case No. 2:25-cv-04588), asserting two portable cart patents: US12275446B2 and US12304546B1. The dispute centred on alleged infringement of Dbest’s patented portable cart technology, a product category in which Dbest has established an active enforcement posture.
The case closed on 5 September 2025 via voluntary dismissal without prejudice under Fed. R. Civ. P. 41(a)(1)(A)(i). Critically, Guangzhou Lincan had not yet filed an answer or motion for summary judgment at the time of dismissal, meaning the procedural threshold for a unilateral dismissal without prejudice was met. Dbest explicitly stated its intent to continue pursuing its claims — not abandoning them — through the related iBeauty Action (2:24-cv-10694-MWC-JC), where the same claims had already been filed as counterclaims.
The 107-day duration suggests Dbest moved quickly once it determined that parallel proceedings were creating inefficiencies. The dismissal appears driven by judicial economy rather than any weakness in Dbest’s substantive position — a distinction that matters for competitors monitoring the enforceability of these two patents. What remains unknown from the public record is the current status and likely resolution timeline of the consolidated iBeauty Action, where the live dispute now resides.
Filing to Voluntary dismissal in 107 days
107 days from filing to voluntary dismissal — a relatively swift procedural exit
Voluntarily dismissed without prejudice: what the dismissal means for both parties
Rule 41 dismissal before answer: a unilateral right
Under Fed. R. Civ. P. 41(a)(1)(A)(i), a plaintiff may voluntarily dismiss without prejudice as of right before the defendant files an answer or motion for summary judgment. Guangzhou Lincan had filed neither, so Dbest’s dismissal required no court approval. This is a procedural tool, not a concession on the merits — the underlying infringement claims remain live.
No court approval requiredWithout prejudice: claims are preserved, not abandoned
A dismissal without prejudice means Dbest retains the right to reassert these patent claims. The dismissal notice explicitly confirms that both patents-in-suit are now asserted as counterclaims in the iBeauty Action (2:24-cv-10694). The public record for this specific docket is silent on any settlement or licensing terms — the case ended purely on procedural consolidation grounds, not resolution of the underlying dispute.
Claims active in iBeauty ActionGuangzhou Lincan faces the same claims in a different docket
While this particular action has closed, Guangzhou Lincan’s exposure to Dbest’s portable cart patent claims has not ended. The infringement allegations now proceed within the iBeauty Action, alongside any related party claims. Guangzhou Lincan’s prior dismissal of a parallel Northern District action (3:25-cv-05344-JD) suggests the dispute landscape is actively being shaped through procedural manoeuvring by both sides.
Exposure continues in iBeauty ActionConsolidation signals a broader portable cart enforcement campaign
The decision to consolidate claims rather than litigate separately suggests Dbest is pursuing a coordinated enforcement strategy across multiple defendants in the portable cart category. Competitors and importers of portable carts should treat the iBeauty Action as the operative enforcement proceeding. The two asserted patents remain active and unresolved on the merits, maintaining their deterrent effect across the product category.
Broader enforcement risk remainsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Dbest Products Inc. | Company | Consumer products company — holder of US12275446B2 and US12304546B1 (portable carts)Search in Eureka ↗ |
| Defendant | Guangzhou Lincan Electronic Technology Co., Ltd. | Company | Guangzhou-based electronics and consumer goods manufacturer alleged to infringe portable cart patentsSearch in Eureka ↗ |
| Plaintiff counsel | Bruce G. Chapman | Attorney | Counsel for Dbest Products Inc.Search in Eureka ↗ |
| Plaintiff counsel | David A. Randall | Attorney | Counsel for Dbest Products Inc.Search in Eureka ↗ |
| Plaintiff counsel | Ehab M. Samuel | Attorney | Counsel for Dbest Products Inc.Search in Eureka ↗ |
| Plaintiff 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 dismissal notice is unusually detailed for a Rule 41 filing, expressly citing judicial efficiency and confirming that all substantive claims survive in the iBeauty Action. The explicit reference to Fed. R. Civ. P. 41(a)(1)(B) regarding costs — each party bearing its own — is consistent with an agreed procedural exit rather than any negotiated settlement. No merits determination was made on either patent; validity and infringement questions remain fully open.
US12275446B2 & US12304546B1 — Portable Cart Technology Patents
The two patents-in-suit — US12275446B2 (application US18/460131) and US12304546B1 (application US19/032431) — both protect innovations in portable cart technology. These are relatively recent grants, with application numbers indicating filings in the 2023–2024 period, suggesting Dbest has been actively building and prosecuting a modern patent portfolio around its core portable cart product line. The patents cover structural and functional aspects of portable carts sold in the consumer and utility market segments.
Dbest’s decision to assert two distinct patents simultaneously suggests the portfolio is designed to provide layered protection — likely covering different structural elements or use configurations to reduce design-around options for competitors. For Chinese manufacturers and importers active in the US portable cart market, both patents represent active enforcement risk. The fact that claims were asserted as counterclaims in the iBeauty Action further signals that Dbest views these patents as commercially strategic, not merely defensive.
Should you run an FTO against US12275446B2 and US12304546B1?
Any company manufacturing, importing, or retailing portable carts in the United States should conduct freedom-to-operate analysis against both Dbest patents. The iBeauty Action confirms these patents are being actively enforced in multi-party proceedings in the Central District of California. Given the recency of both grants and the ongoing litigation, the risk of an infringement allegation targeting similar portable cart products is commercially material.
PatSnap Eureka’s FTO Search Agent enables R&D and product teams to map the claim scope of US12275446B2 and US12304546B1 against their own product specifications — identifying overlap, design-around opportunities, and prosecution history estoppel in minutes. Eureka’s portfolio monitoring tools also allow teams to track any continuation or divisional filings from Dbest that may extend protection beyond the two currently asserted patents.
Run a freedom-to-operate analysis on US12275446B2 to assess your product’s exposure
Run FTO in Eureka →Similar portable cart patent infringement cases in US district courts
Explore related patent infringement actions involving portable cart technology in the Central District of California and comparable US venues.
What this case signals for the portable cart IP landscape
Dbest’s consolidation strategy suggests an organised patent enforcement campaign — not a one-off dispute — in the portable cart category.
Voluntary dismissal without prejudice is not a win for the defendant
Competitors should not interpret this closure as Dbest retreating. The claims are explicitly preserved in the iBeauty Action. Manufacturers, importers, and distributors of portable carts facing Dbest’s patents should monitor the iBeauty docket (2:24-cv-10694-MWC-JC) as the live enforcement forum.
Two active patents in a consolidated case raises enforcement stakes
With both US12275446B2 and US12304546B1 now asserted together in a multi-party action, the iBeauty Action becomes the key venue for testing the validity and scope of Dbest’s portable cart portfolio. Any adverse claim construction ruling there could affect enforcement across the entire patent family.
Dbest v Guangzhou — key questions answered
The case was voluntarily dismissed without prejudice by Dbest Products under Fed. R. Civ. P. 41(a)(1)(A)(i). This means the claims are not extinguished — Dbest explicitly confirmed it is pursuing the same patent infringement claims as counterclaims in the related iBeauty Action (2:24-cv-10694-MWC-JC).
Dbest asserted two patents: US12275446B2 (application US18/460131) and US12304546B1 (application US19/032431), both covering portable cart technology. Both patents remain active and are now asserted in the consolidated iBeauty Action in the Central District of California.
Dbest dismissed to promote judicial efficiency. The same patent claims had already been filed as counterclaims in the broader iBeauty Action (2:24-cv-10694). Consolidating all claims into one proceeding avoids parallel litigation costs and reduces the risk of inconsistent rulings on the same patents.
No. A voluntary dismissal without prejudice has no bearing on patent validity or enforceability. No court made any merits determination on infringement, validity, or claim scope. Both US12275446B2 and US12304546B1 remain in force and are actively asserted in the iBeauty Action.
The iBeauty Action (2:24-cv-10694-MWC-JC, C.D. Cal.) is a related proceeding where Dbest filed its portable cart patent claims as counterclaims. Guangzhou Lincan’s exposure to those claims continues in that forum. A parallel Northern District action (3:25-cv-05344-JD) was also dismissed by Guangzhou Lincan following Dbest’s motion to transfer, further consolidating the dispute.
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