Untitled case
Open- Docket:
- 1:26-cv-04497
- Forum:
- District Court
- Filed:
- 2026-04-21
- Judge:
- Robert W. Gettleman
- Cause:
- Infringement
- Industry:
- Other (O)
Infringed product
The accused products are tips for painting pens.
Plaintiff
1 case as plaintiff.
Juanren Wu is an individual inventor who holds at least one U.S. design patent. There is no evidence that Wu operates a manufacturing or product-based business under this name. Instead, Wu acts as a sole proprietor or individual enforcing patent rights.
Wu's inventive activity, based on court filings, is in the area of art and craft supplies. Specifically, Wu is the inventor and owner of U.S. Design Patent No. D1,049,230-S, described as the "Paint Pen Patent," which relates to diamond paintings. As an individual inventor without apparent commercial operations, Wu is a non-practicing entity (NPE) for the purposes of litigation.
The patent-litigation posture for Juanren Wu is that of a patent enforcer. With a record of one plaintiff case and zero defendant cases, Wu is asserting a patent against alleged infringers. The single tracked case was filed in the U.S. District Court for the Northern District of Illinois. This type of legal action is common for individual patent holders seeking to stop the sale of products they believe copy their patented designs.
The notable case is Wu v. The Partnerships and Unincorporated Associations Identified on Schedule "A". This legal action targets numerous, typically anonymous, e-commerce sellers who are listed on a sealed document (Schedule A) filed with the court. The complaint alleges that these online stores sell "Unauthorized Products" that infringe upon the '230 design patent and targets defendants who ship these products to consumers in the United States, including Illinois.
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The accused products are tips for painting pens.