dbest products v. Guangzhou Linyu: Portable Cart Patents Consolidated into iBeauty Action
dbest products, Inc. filed suit in the Central District of California asserting two portable cart patents against Chinese trading company Guangzhou Linyu Trading Co., Ltd. After 107 days, dbest voluntarily dismissed without prejudice — consolidating all claims into the broader iBeauty Action already pending before the same court.
A strategic consolidation, not an abandonment of claims
On 21 May 2025, dbest products, Inc. filed Case No. 2:25-cv-04587 in the Central District of California, asserting infringement of US12275446B2 and US12304546B1 — both covering portable cart technology — against Guangzhou Linyu Trading Co., Ltd., a Guangzhou-based trading company. Orbit IP LLP represented the plaintiff; no counsel of record appeared for the defendant.
The case closed on 5 September 2025 via a Rule 41(a)(1)(A)(i) voluntary dismissal without prejudice. Critically, dismissal was not driven by weakness in dbest’s position — rather, dbest had already asserted the same claims as counterclaims in the related iBeauty Action (2:24-cv-10694-MWC-JC), making this parallel action redundant. Because Guangzhou Linyu never filed an answer or summary judgment motion, dbest could dismiss unilaterally under Rule 41, preserving all its substantive rights.
The 107-day duration reflects deliberate procedural management rather than contested litigation. A parallel Northern District of California action (3:25-cv-05344-JD) filed by iBeauty was also voluntarily dismissed after dbest moved to transfer it — signalling that dbest is actively steering the entire dispute toward a single consolidated forum. The public record does not disclose the merits of the underlying patent claims or any licensing discussions, but the strategic manoeuvre suggests dbest is confident in pursuing its portable cart IP through the iBeauty Action.
Filing to Voluntary dismissal in 107 days
107-day lifespan — closed before defendant filed any answer or dispositive motion
Voluntarily dismissed without prejudice: what the consolidation means for both parties
Rule 41(a)(1)(A)(i) — unilateral dismissal before answer
Because Guangzhou Linyu never filed an answer or motion for summary judgment, dbest was entitled under Fed. R. Civ. P. 41(a)(1)(A)(i) to dismiss unilaterally — no court order required. A dismissal ‘without prejudice’ means dbest’s patent claims are not extinguished; they survive and are now actively pursued as counterclaims in the iBeauty Action (2:24-cv-10694). This is a procedural consolidation, not a concession.
Claims preserved in iBeauty ActionThe record is explicit: dismissed without prejudice
Unlike voluntary dismissals where the public record is silent on prejudice terms, dbest’s filing expressly states ‘without prejudice.’ This means dbest retains the right to re-file a standalone action on US12275446B2 and US12304546B1 if the iBeauty Action does not resolve those claims. The ‘each party bears its own costs’ provision is standard for pre-answer dismissals and carries no punitive or adverse inference for either side.
No cost award; rights fully preservedGuangzhou Linyu faces ongoing exposure in iBeauty Action
Dismissal of this case does not end Guangzhou Linyu’s exposure. dbest’s counterclaims in the iBeauty Action (2:24-cv-10694) assert the same portable cart patents, meaning Guangzhou Linyu — and potentially affiliated iBeauty entities — must still defend on the merits. The absence of defence counsel in this action suggests either a default-risk strategy or early-stage coordination; that posture carries forward into the consolidated proceeding.
Exposure continues via counterclaimsForum consolidation signals an aggressive dbest IP enforcement posture
dbest’s manoeuvre — filing here, asserting counterclaims in iBeauty, moving to transfer the NorCal action, and then dismissing this case — reflects a coordinated strategy to control forum and docket. For competing portable cart importers and distributors, this pattern suggests dbest is actively maintaining and enforcing its patent portfolio. Companies sourcing portable carts from Chinese manufacturers should assess exposure to US12275446B2 and US12304546B1 before US Customs encounters arise.
Monitor iBeauty Action for merits rulingsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | dbest products, Inc. | Company | Consumer portable cart IP holder — asserting US12275446B2 and US12304546B1Search in Eureka ↗ |
| Defendant | Guangzhou Linyu Trading Co., Ltd. | Company | Guangzhou Linyu Trading Co., Ltd. — Chinese trading company, no counsel appearedSearch 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 text is unusually detailed for a Rule 41 filing, functioning as a public statement of strategic intent. By expressly noting that Guangzhou Linyu had not answered, that counterclaims are live in the iBeauty Action, and that a parallel NorCal action was also eliminated, dbest’s counsel signals that this dismissal is docket management — not disengagement. The ‘without prejudice’ designation and self-bearing costs provision are legally standard but contextually significant: dbest retains full optionality to re-file if the iBeauty consolidation does not achieve its objectives.
US12275446B2 & US12304546B1 — Portable Cart Technology
US12275446B2 (application US18/460131) and US12304546B1 (application US19/032431) both relate to portable cart technology — a product category encompassing folding, rolling, and collapsible utility carts used in consumer, retail, and light commercial settings. The sequential application numbers suggest these patents are part of a continuing prosecution strategy, with dbest building a layered portfolio around its core portable cart innovations. The precise claim scope — whether directed to structural configurations, materials, or methods of use — will be determinative in the iBeauty Action.
For the portable cart and consumer goods sector, a two-patent assertion from a US entity against a Chinese importer is a familiar but escalating enforcement pattern. dbest’s portfolio strategy — maintaining multiple patents covering related cart technology — raises the competitive barrier for importers seeking design-arounds. Any entity manufacturing, importing, or distributing portable wheeled carts in the US market should assess whether their product configurations read on either patent’s independent claims, particularly given dbest’s demonstrated willingness to litigate across multiple courts simultaneously.
Should your team run an FTO against US12275446B2 and US12304546B1?
If your company designs, imports, or distributes portable carts — including folding utility carts, wheeled shopping trolleys, or collapsible transport carts — sold into the US market, these two patents represent an active enforcement risk. dbest has demonstrated multi-forum litigation capability and is actively pursuing its claims in a consolidated action that includes counterclaims on both patents. An FTO assessment is particularly urgent for companies sourcing from Guangzhou-region manufacturers given the defendant profile in this case.
PatSnap Eureka’s FTO Search Agent allows R&D and legal teams to map their product configurations against the independent claims of US12275446B2 and US12304546B1, identify relevant prior art that may support invalidity arguments, and monitor the iBeauty Action for claim construction orders that will define the enforceable scope of both patents. Set up automated litigation alerts to receive updates as the consolidated action progresses.
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 C.D. California
Explore related patent infringement actions involving portable cart technology and consumer goods IP enforcement in the Central District of California and comparable federal venues.
What this case signals for the portable cart and consumer goods IP landscape
dbest’s forum-consolidation play is a textbook enforcement strategy — and a warning to importers of competing portable cart products.
Pre-answer dismissals preserve all claims — treat them as resets, not retreats
A Rule 41(a)(1)(A)(i) dismissal without prejudice before the defendant answers is the procedural equivalent of reloading. dbest lost nothing here — its patents remain asserted and its forum choice is now concentrated in a single, more strategically favourable docket. IP counsel monitoring this space should track the iBeauty Action (2:24-cv-10694) for substantive rulings on US12275446B2 and US12304546B1.
Importers of portable carts face compounding enforcement risk
The fact that dbest is litigating on multiple fronts simultaneously — and actively consolidating those fronts — suggests a structured enforcement campaign. Distributors, retailers, and importers sourcing portable cart products from Guangzhou-region manufacturers should treat this case as an early signal and conduct freedom-to-operate analysis against both asserted patents before US market entry or continued distribution.
dbest v Guangzhou — key questions answered
dbest products, Inc. filed a patent infringement suit against Guangzhou Linyu Trading Co., Ltd. in the Central District of California on 21 May 2025, asserting US12275446B2 and US12304546B1 covering portable carts. The case was voluntarily dismissed without prejudice on 5 September 2025 after 107 days, with dbest consolidating its claims as counterclaims in the related iBeauty Action (2:24-cv-10694-MWC-JC).
dbest dismissed to promote judicial efficiency after it had already asserted the same patent claims as counterclaims in the broader iBeauty Action (2:24-cv-10694). Guangzhou Linyu had not filed an answer, allowing dbest to dismiss unilaterally under Rule 41(a)(1)(A)(i). dbest also successfully moved to have a parallel Northern District action voluntarily dismissed, concentrating all claims in one forum.
No. The dismissal was explicitly ‘without prejudice,’ meaning dbest’s patent claims under US12275446B2 and US12304546B1 remain alive. Those claims are now being pursued as counterclaims in the iBeauty Action (2:24-cv-10694-MWC-JC) in the Central District of California. Guangzhou Linyu continues to face potential infringement liability in that consolidated proceeding.
dbest asserted two US patents: US12275446B2 (application number US18/460131) and US12304546B1 (application number US19/032431). Both patents relate to portable cart technology. The sequential application numbers suggest they form part of a continuing patent family, though the precise claim scope will be adjudicated in the iBeauty Action.
The iBeauty Action refers to iBeauty Limited Co. et al. v. dbest products, Inc., Case No. 2:24-cv-10694-MWC-JC, pending in the Central District of California. dbest asserted its portable cart patent claims — including those under US12275446B2 and US12304546B1 — as counterclaims in that action. The dismissal of Case 2:25-cv-04587 was expressly designed to consolidate all claims into the iBeauty Action for efficiency.
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