Tigo Energy Inc. v. SunSpec Alliance

Background

Tigo Energy Inc. alleged that SunSpec Alliance infringed Claims 1 and 12 of Tigo’s U.S. Patent No. 8,933,321, which concerns systems and methods for rapidly shutting down solar-panel systems during emergencies or maintenance. Tigo alleged that SunSpec published rapid-shutdown specifications and provided testing and certification services for products designed to comply with those specifications.

According to the complaint, when a SunSpec member sought certification, a SunSpec-authorized laboratory performed required tests under SunSpec’s direction and control. Tigo alleged that those tests involved making and using systems covered by the patent. Tigo also asserted theories based on SunSpec’s members, their customers, and solar-system installers.

Tigo asserted three theories of patent liability: literal infringement, infringement under the doctrine of equivalents, and induced infringement. Literal infringement means that the accused conduct meets every requirement of a patent claim. The doctrine of equivalents can apply when an accused system does not literally meet a claim but is substantially equivalent. Induced infringement involves taking affirmative steps to cause another party to infringe while knowing that the conduct constitutes infringement.

Motion to dismiss standard

SunSpec moved to dismiss under Federal Rule of Civil Procedure 12(b)(6), arguing that the complaint did not state a claim for which relief could be granted. At this stage, the court accepted well-pleaded factual allegations as true and asked whether they made liability plausible, rather than merely possible.

Analysis

Laboratory testing

The court held that Tigo plausibly alleged infringement based on testing by SunSpec-affiliated laboratories. The complaint alleged that the laboratories tested products under SunSpec’s direction and control and that the testing used or made systems practicing the relevant SunSpec specification.

The court noted that the testing diagrams cited in the complaint appeared to use components simulating a solar module rather than an actual solar module. Standing alone, those allegations did not plausibly show that SunSpec itself used every element of the claimed system. But the complaint also relied on a system configuration that appeared to include solar modules and alleged that SunSpec directed and controlled laboratory testing of products using that system.

Based on those allegations, the court found it plausible that the laboratories used the claimed systems and that SunSpec could be vicariously liable for their conduct. Vicarious liability here means that one party may be held responsible for a third party’s conduct because the first party directed the conduct or the third party acted as its agent. The court also found that the allegations plausibly supported a theory that SunSpec made the claimed systems through the laboratories’ testing.

The court allowed Tigo’s doctrine-of-equivalents theory to proceed, but only insofar as it was based on the affiliated laboratories’ testing under the specification. The court found that Tigo’s general equivalents allegations were sufficient at this stage because the complaint plausibly alleged literal infringement on that limited laboratory-testing theory.

The court also found that Tigo plausibly alleged induced infringement by SunSpec through the laboratories. Tigo alleged that SunSpec directed the laboratories to perform required tests, knew about the patent and the asserted claims, had been notified that the claims were necessary to the specification, and nevertheless directed the testing. The court concluded that these allegations plausibly showed affirmative conduct, knowledge, and specific intent at the pleading stage.

Members, customers, and installers

The court reached a different conclusion about allegations involving SunSpec’s members, customers, and solar installers. Tigo alleged that these actors made, used, sold, offered for sale, or imported products and systems complying with the SunSpec specification. But the court found that the complaint did not adequately explain how those acts infringed the patent’s system claims.

The court specifically noted that the complaint described SunSpec members’ items as products and compared them to individual elements of the patent claims, rather than explaining how the members’ conduct involved an infringing system. The allegations concerning customers and installers were also too general. Because the complaint did not plausibly plead direct infringement by those actors, it also did not adequately support induced infringement based on their conduct or the related doctrine-of-equivalents allegations.

Disposition

Judge H. Orrick denied in part and granted in part SunSpec’s motion to dismiss, with leave to amend. Tigo’s infringement claim could proceed under the theories based on SunSpec-affiliated laboratories’ alleged use or making of the claimed systems. The portions of the claim relying on alleged acts by SunSpec’s members, customers, or solar installers were dismissed with leave to amend. Any amended complaint was due within 20 days of the order’s issuance.