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Celine Liu
Senior Counsel
Litigation
Washington, D.C.

D202-791-8026

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Celine Liu is senior counsel in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where she focuses on intellectual property litigation and counseling. Celine has litigated more than 30 cases before federal district courts, state courts, and the U.S. International Trade Commission concerning patent, trade secret, and licensing disputes. She has represented clients in litigation involving semiconductor technologies, mobile communications devices, wireless network communications products, LED lighting products, consumer electronics, computer cooling products, pharmaceuticals, and rare-earth products.

Celine has been involved in patent cases in court and administrative proceedings that occur outside of the U.S. She has also arbitrated cases overseas involving contract and commercial disputes.

Celine frequently speaks on matters related to U.S. patent law and litigation at conferences and panels. She is fluent in Mandarin.

Experience

Celine Liu is senior counsel in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where she focuses on intellectual property litigation and counseling. Celine has litigated more than 30 cases before federal district courts, state courts, and the U.S. International Trade Commission concerning patent, trade secret, and licensing disputes. She has represented clients in litigation involving semiconductor technologies, mobile communications devices, wireless network communications products, LED lighting products, consumer electronics, computer cooling products, pharmaceuticals, and rare-earth products.

Celine has been involved in patent cases in court and administrative proceedings that occur outside of the U.S. She has also arbitrated cases overseas involving contract and commercial disputes.

Celine frequently speaks on matters related to U.S. patent law and litigation at conferences and panels. She is fluent in Mandarin.

Focus Areas
Recent Insights
Client Highlights
Firm Obtains Complete Jury Victory for Cyntec in Patent Validity Trial
On March 5, 2026, Wilson Sonsini Goodrich & Rosati secured a complete jury victory in a patent invalidity trial in the U.S. District Court for the Northern District of California on behalf of firm client Cyntec Company, Ltd. Rejecting defendant Chilisin’s arguments on obviousness, the jury found that all asserted claims of Cyntec’s U.S. Patent Nos. 8,922,312 and 9,481,037 were valid. Wilson Sonsini also represented Cyntec in a previous jury trial which had found that Chilisin willfully infringed both patents and imposed a 5 percent royalty. 
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Client Highlights
Wilson Sonsini Secures Jury Trial Victory for Google in Case Alleging Misuse of Advertising Technology
On June 10, 2025, Wilson Sonsini secured a complete defense verdict from a Los Angeles jury in ReactX LLC v. Google LLC.  ReactX sought $1.3 billion in damages, alleging that Google breached a series of contracts by misusing ReactX’s confidential technology to build two of Google’s most successful digital advertising products. ReactX originally brought the case as one for trade secret misappropriation, but just two weeks before trial, it voluntarily dismissed its trade secret cause of action. The court further trimmed ReactX’s lawsuit in response to nonsuit motions brought by Wilson Sonsini, ruling that Google was bound by only one of the contracts asserted by ReactX and dismissing ReactX’s cause of action for breach of the implied covenant of good faith and fair dealing. After a six-week trial featuring 17 witnesses, the jury completely vindicated Google on ReactX’s remaining cause of action for breach of contract.

The Wilson Sonsini team representing Google in the matter was led by partners Colleen Bal, John Flynn, Tait Graves, Josh Baskin, and Lucy Yen, and included Andrew Alderette, Stephanie Cheng, Kayla Dessel, Katherine Ericson, Celine Liu, Sachli Nayeri, Courtney Reed, Matt Donohue, Doug Brockmeier, Sissel Browder, Shannon Hill, and Pamela Sandillo.
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