Matthew Warren


San Francisco Office
Tel: +1 415-875-6600
Fax: +1 415-875-6700

Practice Areas
Antitrust and Trade Regulation
Class Action Litigation
Intellectual Property Litigation
International Trade Commission Proceedings
Structured Finance and Derivatives Litigation
Transnational Litigation


Harvard Law School

(J.D., 1998)

Yale College
(B.A., 1993)

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Matt Warren focuses on complex litigation, with a particular emphasis on matters concerning high technology.  His practice primarily includes intellectual property matters concerning patents, copyrights and trademarks; antitrust matters; and litigation surrounding complex financial instruments and related accounting treatment.  He has practiced in state and federal courts in California and across the country.

Representative Clients


Seiko Epson
Konica Minolta

Notable Representations


Currently represents Google in litigation regarding allegations of patent infringement by various Android devices, including multiple District Court cases and investigations before the International Trade Commission.

Represented Google, Motorola, Samsung and HTC in litigation before the Eastern District of Texas regarding allegations of patent infringement by the Dalvik virtual machine.  Obtained summary judgment of non-infringement of all claims.

Represented HTC in multi-district litigation involving intellectual property in mobile telephones, including an I.T.C. investigation in which Apple asserted infringement covering a broad range of claimed inventions.  In that investigation, Apple dismissed five patents following discovery, and one more during trial.  Following trial, the firm won a final determination of non-infringement on three patents.

Represented a global telecommunications company in state and federal litigation involving intellectual property in mobile telephones.  Among these related matters, defended an I.T.C. investigation and obtained a final determination that our client did not infringe any of the patents-in-suit, and that two of the four asserted claims were invalid.

Defeated class certification in two multi-billion dollar antitrust class actions before the Northern District of California that asserted price fixing in sales of flash memory.  The Court of Appeals declined to reconsider the District Court's decision to deny class certification.

Represented Seiko Epson in litigation involving accused patent infringement by printers before the Eastern District of Texas.  Following discovery, the case settled shortly after we filed our claim construction brief.

Obtained complete dismissal of claims under California Bus. & Prof. Code § 17200 against a major insurance company, alleging illegal, fraudulent or unfair business practices arising from the market disruption of 2008.