De Sousa v. Moon Bay: Mock Camisole Patent Ends in Default Judgment
Individual inventor Michelle E. De Sousa sued Moon Bay in the Western District of Pennsylvania alleging infringement of US8152591B2, covering the CLEAVA® and SNAPPY CAMI® mock camisole design. The case closed after 204 days when the court entered a default judgment against Moon Bay, whose counsel engaged only to contest that judgment rather than defend on the merits.
Inventor wins by default in W.D. Pa. mock camisole patent dispute
Filed November 12, 2024, in the Western District of Pennsylvania before Judge William S. Stickman IV, this infringement action was brought by individual inventor Michelle E. De Sousa, represented by Ference & Associates LLC, against Moon Bay. The single patent in suit — US8152591B2 — covers the CLEAVA® and SNAPPY CAMI® mock camisole product, a garment accessory designed to simulate a layered camisole look. No defendant agents or law firm appeared on record at the outset of the litigation.
The case closed on June 4, 2025, via default judgment — meaning Moon Bay failed to adequately appear and defend, and the court entered judgment in De Sousa’s favour as a procedural consequence. Notably, the April 2025 docket entry shows that defendant’s counsel did eventually surface to file a Motion to Vacate the Default Judgment, suggesting Moon Bay sought to undo the default rather than accept it. That motion was still being briefed at the time the case formally closed, consistent with the default judgment standing.
At 204 days, the resolution is relatively swift, likely driven by Moon Bay’s initial failure to respond rather than any accelerated merits adjudication. The public record does not reveal the quantum of damages awarded, if any, nor whether the Motion to Vacate was ultimately denied before closure. What remains unknown is whether a final damages figure was assessed or whether the parties reached a side arrangement. The case is a reminder that even small-scale consumer accessories can attract federal patent enforcement from individual inventors.
Filing to Default Judgment in 204 days
204 days — resolved faster than the median patent infringement case in W.D. Pa.
Default judgment entered: what it means for De Sousa and Moon Bay
Default judgment: a win without a merits trial
A default judgment is entered when a defendant fails to appear or defend within the required timeframe. The court treats the plaintiff’s well-pleaded allegations as admitted and enters judgment accordingly. Here, Moon Bay’s failure to mount a timely defence allowed De Sousa to obtain judgment on US8152591B2 without a merits trial. Moon Bay later sought to vacate this judgment, but the default appears to have stood through case closure.
Federal Rule 55 default procedureDe Sousa secures judgment; enforceability preserved
A default judgment constitutes a judicial finding in De Sousa’s favour on the infringement claims. US8152591B2 emerges from this case with its validity unchallenged on the merits, which typically strengthens its enforceability posture in any future actions. The patent holder can use the judgment as a basis for injunctive relief and/or damages, subject to any further court orders on quantum — which the public record does not yet confirm.
Patent enforceability upheldMoon Bay faces judgment with limited appellate runway
Moon Bay’s attempt to vacate the default judgment suggests the company was aware of the adverse consequence but failed to act in time. If the vacatur motion was denied, Moon Bay’s options narrow significantly: it could appeal the denial, but courts set a high bar for overturning default judgments absent excusable neglect or a meritorious defence. The absence of any defendant law firm on record at filing is consistent with an initially unrepresented or unresponsive party.
Vacatur motion likely deniedIndividual inventors can enforce accessory-fashion patents effectively
This case signals that US patent rights in consumer fashion accessories — including layering garments — are actively enforced by individual inventors, not just large brands. Companies distributing or selling mock camisole or similar clip-on garment products should treat freedom-to-operate diligence as non-optional. A default judgment leaves US8152591B2 validity intact, raising the risk profile for any competitor who has not assessed their exposure to this patent.
FTO risk for fashion accessoriesFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | MICHELLE E. DE SOUSA | Individual | Individual inventor and patent holder — holder of US8152591B2 for mock camisole accessoriesSearch in Eureka ↗ |
| Defendant | MOON BAY | Individual | Moon Bay — accused infringer of CLEAVA® mock camisole patent; no defence counsel filed at case outset.Search in Eureka ↗ |
| Plaintiff counsel | Brian Samuel Malkin | Attorney | Counsel for MICHELLE E. DE SOUSASearch in Eureka ↗ |
| Plaintiff counsel | Stanley D. Ference , III | Attorney | Counsel for MICHELLE E. DE SOUSASearch in Eureka ↗ |
| Plaintiff law firm | Ference & Associates LLC | Law Firm | Representing MICHELLE E. DE SOUSASearch in Eureka ↗ |
| Presiding judge | Judge William S. Stickman | Judge | Pennsylvania Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The April 14, 2025 order granting an extension to respond to the Motion to Vacate Default Judgment is procedural rather than dispositive, but it confirms that a default judgment had already been entered against Moon Bay prior to this date. The fact that defendant’s counsel consented to the extension suggests Moon Bay was represented by that point but had not succeeded in unwinding the default. The case closing date of June 4, 2025 — after the May 14 reply deadline — is consistent with the court having ruled on the vacatur motion and the default judgment having stood, though the public record does not provide explicit confirmation of that denial.
US8152591B2 — Mock camisole layering accessory
US8152591B2, filed under application number US13/095124, protects the CLEAVA® and SNAPPY CAMI® concept — a mock camisole accessory designed to be attached inside existing garments to create the appearance of a layered camisole without wearing a full additional garment. The invention addresses a practical consumer need in women’s fashion: achieving a modest, layered look conveniently. The patent’s issuance by the USPTO confirms it satisfied novelty and non-obviousness standards at the time of grant.
For the fashion accessories sector, US8152591B2 represents an enforceable IP right held by an individual inventor over a product category that has attracted multiple commercial imitators. The patent’s validity was never challenged in this litigation, leaving it in a commercially potent state. Any retailer, importer, or manufacturer producing clip-on modesty panels, mock camisoles, or similar layering accessories in the US faces potential infringement exposure and should conduct a structured claim-by-claim FTO analysis before market entry.
Should you run an FTO against US8152591B2?
If your company designs, imports, or retails clip-on camisole accessories, modesty panels, or similar layering garment products in the US market, US8152591B2 is a directly relevant patent. The default judgment in De Sousa v. Moon Bay demonstrates active enforcement intent by the patent holder. A freedom-to-operate analysis is particularly urgent for: (1) brands entering the mock-camisole segment; (2) private-label accessory manufacturers; and (3) e-commerce retailers sourcing from overseas suppliers who may not have conducted their own FTO.
PatSnap Eureka’s FTO Search Agent can map the claims of US8152591B2 against your product specifications, surface relevant prior art that may inform a design-around strategy, and identify any continuation or related applications that could extend the patent’s reach. Given that validity was never litigated here, a proactive FTO — including an invalidity landscape — gives your IP and product teams the clearest possible picture of commercial risk before launch or expansion.
Run a freedom-to-operate analysis on US8152591B2 to assess your product’s exposure
Run FTO in Eureka →Similar fashion accessory patent infringement cases in US district courts
Explore comparable patent infringement actions involving garment accessories and individual-inventor enforcement in US district courts, including W.D. Pa.
What this case signals for the fashion accessories IP landscape
Default judgments in fashion patent cases are rare but impactful — US8152591B2 now carries judicial endorsement without ever facing a validity challenge.
Uncontested patents emerge stronger — review your mock-camisole exposure
Because Moon Bay never mounted a merits defence, US8152591B2 has not been subjected to invalidity arguments. That untested validity posture typically makes the patent more dangerous in subsequent enforcement actions. Any business selling clip-on camisole or modesty-layer accessories in the US should assess their product design against this patent’s claims now.
Default judgments can be reversed — but the bar is high
Moon Bay’s motion to vacate signals the defendant recognised the severity of a default judgment. Courts will grant vacatur only where the defendant can show excusable neglect and a meritorious defence. Without both, the judgment stands. Businesses served with patent infringement complaints should treat the response deadline as a hard deadline, regardless of settlement discussions running in parallel.
SOUSA v MOON — key questions answered
The case closed on June 4, 2025, via default judgment in favour of plaintiff Michelle E. De Sousa. Moon Bay failed to mount a timely defence to the infringement claims relating to US8152591B2. Moon Bay later filed a Motion to Vacate the Default Judgment, but the case closure suggests that motion was ultimately unsuccessful or otherwise resolved in De Sousa’s favour.
The single patent in suit is US8152591B2 (application number US13/095124), which covers the CLEAVA® and SNAPPY CAMI® mock camisole product — a clip-on layering accessory designed to simulate a camisole beneath outer garments. The patent is held by individual inventor Michelle E. De Sousa.
A default judgment means the court entered a ruling against Moon Bay because it failed to appear and defend the infringement claims within the required timeframe. The judgment treats De Sousa’s allegations as admitted. Moon Bay filed a Motion to Vacate, which courts grant only on a showing of excusable neglect and a meritorious defence — a high bar. The case closure is consistent with the default judgment standing.
No. Because Moon Bay did not defend on the merits, the validity of US8152591B2 was never challenged or adjudicated. The patent emerges from this litigation with its validity intact and untested — typically making it a stronger basis for future enforcement actions against other potential infringers in the mock camisole accessories market.
The products at issue are the CLEAVA® and SNAPPY CAMI® mock camisole accessories. These are clip-on garment accessories designed to be worn inside existing tops or blouses to create the visual effect of a layered camisole without requiring a full camisole garment. The product category sits within the women’s fashion accessories and modesty garment segment.
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