Hand Warmer Patent Win: Default Judgment Against Online Sellers in Schedule A Litigation
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📋 Case Summary
| Case Name | Guangdong Aoyun Technology Co., Ltd. v. Partnerships and Unincorporated Associations Identified on Schedule A |
| Case Number | 1:24-cv-12808 (N.D. Ill.) |
| Court | U.S. District Court for the Northern District of Illinois |
| Duration | Dec 2024 – May 2025 5 months |
| Outcome | Plaintiff Win – Default Judgment |
| Patents at Issue | |
| Accused Products | Combined-type hand warmer products (e.g., Amazon ASIN B0DBLW8JGZ) |
Case Overview
The Parties
⚖️ Plaintiff
Chinese manufacturer in consumer electronics and personal comfort devices, holder of patent US12115099B2.
🛡️ Defendants
Consolidated group of anonymous online marketplace sellers, typically operating across platforms like Amazon, Temu, TikTok Shop.
The Patent at Issue
This case centered on U.S. Patent No. **US12115099B2** (Application No. US18/514327), protecting a novel combined-type hand warmer design.
- • US12115099B2 — Combined-type hand warmer design with structural and functional innovations
- • Technology Area: Consumer personal comfort devices
- • Key Claim Scope: Enables enforcement against sellers offering substantially similar configurations in the U.S. market.
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The Verdict & Legal Analysis
Outcome
Chief Judge Kennelly **granted Plaintiff’s Motion for Entry of Default and Default Judgment in full**. The court issued a permanent injunction, platform-level enforcement directives, and a damages award calculated at **$10 per unit sold** against the defaulting defendants.
Injunctive Relief: Scope and Platform Coverage
The permanent injunction broadly restrains defaulting defendants and their agents from offering, selling, or importing infringing products. Crucially, it extends to third-party platform providers like Amazon, eBay, Alibaba, AliExpress, Temu, TikTok, Walmart, Etsy, Wish.com, and DHgate, requiring them to disable associated accounts and listings within seven calendar days of notice. The court also issued an ASIN-specific injunction explicitly covering Amazon ASIN B0DBLW8JGZ, blocking future sales of that specific product listing.
Damages Analysis
Damages were awarded on a **per-unit profit margin of $10**, applied to each infringing unit sold through the defendants’ seller aliases. Third-party payment processors—including PayPal, Amazon Pay, Alipay, Ant Financial, and others—were ordered to apply held funds toward satisfying the damages award within seven calendar days of notice. The court also preserved plaintiff’s rights to commence supplemental proceedings to collect any unpaid damages.
Legal Significance of Default Judgment in Schedule A Litigation
Default judgments in Schedule A cases establish enforceable court orders that bind platforms as well as defendants, creating practical market-level relief. They demonstrate effective enforcement pathways for patent holders facing diffuse infringement across e-commerce platforms. The **159-day resolution timeline** demonstrates that coordinated Schedule A actions can deliver enforceable injunctions within a single calendar year of filing.
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⚠️ Freedom to Operate (FTO) Analysis & IP Risks
This case highlights critical IP risks in consumer device design and e-commerce enforcement. Choose your next step:
📋 Understand This Case’s Impact
Learn about Schedule A litigation, multi-platform injunctions, and per-unit damages.
- View all patents related to hand warmer technology
- Analyze enforcement trends against anonymous sellers
- Understand procedural steps for default judgments
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High-Risk Area
Consumer comfort devices, combined designs
US12115099B2
Key patent in hand warmer design
Fast Enforcement
Schedule A enables rapid injunctions
✅ Key Takeaways
For Patent Attorneys & Litigators
Schedule A default judgments deliver rapid, multi-platform injunctive relief without the cost of contested litigation.
Search related case law →ASIN-specific injunctions are an emerging, highly effective enforcement tool in e-commerce patent cases.
Explore precedents →The Northern District of Illinois remains a favorable venue for Schedule A patent enforcement actions.
View court trends →Per-unit damages structures ($10/unit here) can be efficiently calculated and enforced against payment processors.
Understand damage calculations →For R&D Teams & IP Professionals
Conduct FTO analysis at the ASIN/product-listing level before launching on major platforms.
Start FTO analysis for my product →Product designs for competitive consumer goods should be meaningfully differentiated from recent patent filings.
Try AI patent drafting →Build platform-account monitoring into IP enforcement programs to capture Schedule A candidates early.
Explore monitoring tools →Monitor newly issued patents in high-volume consumer goods; patent activity continues in mature markets.
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