Christopher Sun

We defended the United States’ largest self-storage operator, Public Storage, in two class actions filed in California alleging violations of Business & Professions Code Section 17200 and the Consumer Legal Remedies Act. We successfully defeated class certification in the Downey case in May 2018 (and handled the appeal in which that decision was affirmed) and won a complete defense verdict in the Perez case after trial—one of only a handful of class action trials recently conducted in California.

We represented three immigrant families intentionally separated by the Trump Administration in 2018. Asserting novel claims under the Federal Tort Claims Act, we vigorously pursued the case until the eve of trial, when the government agreed to the largest settlement out of any of the fifty similar cases filed nationwide.

We represent Moonton, a Chinese video game developer, in a lawsuit filed by Riot Games asserting claims of copyright and trademark infringement relating to Riot’s League of Legends video game. We filed a motion to dismiss based on the doctrine of forum non conveniens, arguing that Riot should be required to pursue its claims in China because its lawsuit was intertwined with and inconsistent with a pending Chinese lawsuit filed by Riot’s parent company, Tencent. The Court granted the motion and dismissed the lawsuit.

We are defending Google in consolidated cases on behalf of a worldwide putative class of mobile device users that are challenging Google’s location-data practices. We obtained a dismissal at the pleading stage of all of plaintiffs’ claims, including a dismissal with prejudice of plaintiffs’ claims for violation of the California Invasion of Privacy Act. Following dismissal with prejudice of what plaintiffs viewed as their most valuable claim, the case subsequently reached a settlement, which we are currently defending on appeal at the Ninth Circuit against objectors’ counsel.

We defended Google against an AI-related patent infringement suit brought by Singular Computing that alleged Google’s TPU chips (custom-designed hardware used for training and inference of large AI models) infringed Singular’s patents. After Google successfully invalidated some of the patent claims through inter partes review, the KVP team led Google’s defense in a 2-week trial in Boston federal court on a narrowed set of claims. Shortly before closing arguments, Singular accepted a pending settlement offer.

OpenAI tapped Keker as lead trial counsel in a series of copyright lawsuits that will establish the boundaries of copyright fair use as applied to generative AI. The cases include claims brought by newspapers, authors, and other media outlets alleging that the training and outputs of Open AI's large language models infringe their works.