Background
Socket Solutions, LLC owns U.S. Patent No. 9,509,080, directed to an indoor electrical wall-outlet cover that conceals the outlet’s contact openings while allowing continued use. Socket Solutions sued Import Global, LLC in the Southern District of Florida, alleging that Import Global’s Neat Socket® product infringed claim 19.
The district court adopted a magistrate judge’s claim constructions and recommendation to grant preliminary relief. Its injunction barred Import Global from manufacturing, using, selling, offering to sell, or importing the accused product and products not more than colorably different from it, and from inducing those activities. Import Global appealed, challenging the district court’s likelihood-of-success and irreparable-harm analyses.
The Court’s Holding
The Federal Circuit vacated the preliminary injunction and remanded because the district court incorrectly construed the claim terms “backplate” and “pin,” undermining its determination that Socket Solutions was likely to prove infringement. The court construed “backplate” as “the component forming the cover with the frontplate, such that the maximum thickness of the cover is the distance, at the central portion of the cover, between the frontplate and the component.” It rejected constructions that defined the backplate through a spatial relationship to either the frontplate or the wall outlet.
The court also held that “pin” is not a means-plus-function limitation under 35 U.S.C. § 112(f). Because the term denotes structure and the patent contained no lexicography or disavowal warranting a departure, “pin” receives its plain and ordinary meaning as understood by a skilled artisan. The court did not decide Import Global’s irreparable-harm arguments, but held that a court may not presume irreparable harm from a clear showing of patent validity and infringement; if reached on remand, that factor must be assessed without such a presumption.
Key Takeaways
- A preliminary injunction premised on erroneous patent claim constructions cannot stand when those constructions affect the likelihood-of-infringement analysis.
- A structural claim term lacking the word “means” is not governed by § 112(f) when the presumption against means-plus-function treatment has not been overcome.
- After eBay and Federal Circuit precedent applying it, irreparable harm may not be presumed in either the permanent- or preliminary-injunction context.
Why It Matters
The decision reinforces that courts must resolve claim construction carefully before restricting an accused infringer’s commercial activity at the preliminary stage. A functional description cannot expand a structural claim term beyond its plain and ordinary meaning without support in the patent.
The opinion also expressly extends the rejection of a patent-specific presumption of irreparable harm to preliminary injunctions. Patent owners must establish likely irreparable injury through evidence under the traditional four-factor equitable framework, even when validity and infringement appear clear.