2:25-cv-00769
W.D. Pa.Jul 9, 2025Background
- Plaintiff Changchun Li owns a U.S. design patent for a unique air humidifier and alleges that 48 defendants sold infringing products online without authorization.
- Li requested a preliminary injunction, a temporary restraining order, expedited discovery, and other relief against these defendants, asserting widespread coordinated infringement.
- The court initially granted the temporary restraining order and scheduled a hearing on the preliminary injunction, later dismissing 16 defendants voluntarily.
- At the show cause hearing, no defense representatives appeared; Li’s counsel presented no new evidence for the injunction beyond what supported the temporary restraining order.
- Central to the court’s review was whether all remaining defendants were properly joined in the same case under heightened patent case joinder standards found in 35 U.S.C. § 299.
- The court denied the preliminary injunction as to 31 of the 32 remaining defendants (granting it only as to Tianwide), citing insufficient evidence of a legal connection between most defendants to allow joinder.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Propriety of Multi-Defendant Joinder | Stores share identifiers, practices, and sources, creating a logical relationship | No appearance | Joinder improper under § 299 based on the evidence |
| Standard for Preliminary Injunction | Criteria satisfied due to repeated and ongoing infringement | No appearance | Failure to show likelihood of success on merits due to joinder defect |
| Evidence of Coordinated Conduct | Common features and alleged online communication show connection | No appearance | General similarities and communication allegations insufficient to establish coordination |
| Judicial Economy & Fairness | All defendants should be handled together for efficiency | No appearance | Even if joinder were technically allowed, severance warranted for fairness and court efficiency |
Key Cases Cited
- Kos Pharms., Inc. v. Andrx Corp., 369 F.3d 700 (3d Cir. 2004) (sets out the standard for preliminary injunctions in the Third Circuit)
- Reilly v. City of Harrisburg, 858 F.3d 173 (3d Cir. 2017) (emphasizes importance of likelihood of success and irreparable harm in preliminary injunctions)
- In re EMC Corp., 677 F.3d 1351 (Fed. Cir. 2012) (interprets "same transaction or occurrence" standard for patent infringement joinder)