Phillip H. Warren

Ben Riley is a Principal of the firm and serves on its Executive Committee. He has tried nearly 30 cases to verdict including jury trials, court trials, and complex arbitrations. His practice focuses on Intellectual Property Litigation, including patents, trade secrets, copyrights, trademarks and license disputes. He also has an active practice in Business Litigation, including class action defense, defense of “consumer claims” under the Lanham Act and unfair competition statutes,...

Patrick Gunn is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Patrick, who practices law in San Francisco, California, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Patrick is held by other top lawyers in the same geographic and legal practice area.

Henry C. Bunsow has been lead trial counsel in more than 40 patent jury trials, winning over 90 percent of them. He has successfully argued appeals before the Court of Appeals for the Federal Circuit and represents clients in matters before district courts across the nation, the Court of Appeals for the Federal Circuit and the U.S. International Trade Commission (ITC) under Section 337. In 2011, he received the California Lawyer Intellectual Property Attorney of the Year Awardand he has consi...

Based in the firm’s San Francisco office, Deborah Rosenthal brings 25 years of experience as a litigator to the firm’s asbestos, sexual abuse, and personal injury practice groups. She has helped secure millions of dollars in verdicts and settlements on her clients’ behalf, against defective product manufacturers, oil and shipping companies, telecom carriers, and other institutional and individual wrongdoers. A writer for as long as she can remember, Deborah became a lawyer t...

Caitlin Sinclaire Blythe is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Caitlin Sinclaire, who practices law in San Francisco, California, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Caitlin Sinclaire is held by other top lawyers in the same geographic and legal practice area.

Joshua D. White is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Joshua D., who practices law in San Francisco, California, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joshua D. is held by other top lawyers in the same geographic and legal practice area.

Mary Powell is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Mary, who practices law in San Francisco, California, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mary is held by other top lawyers in the same geographic and legal practice area.

Kelly is Managing Partner of the San Francisco office of Lieff, Cabraser, Heimann & Bernstein, LLP. She is Immediate Past Chair of the American Bar Association’s Section of Labor and Employment Law, and a member of the ABA’s Diversity & Inclusion Advisory Council. Kelly specializes in civil rights and employment class and collective actions on behalf of plaintiffs, and individual cases addressing sexual abuse, harassment, and trafficking. Kelly is a nationally-recognized a...

Hilary C. Pierce is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Hilary C., who practices law in San Francisco, California, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Hilary C. is held by other top lawyers in the same geographic and legal practice area.

Nathaniel M. Cartmell III is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Compliance Law, Corporate Governance Law, Corporate Law, Mergers and Acquisitions Law and Securities / Capital Markets Law. Nathaniel M., who practices law in San Francisco, California, has been recognized since 2005. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Nathaniel M. is held by other top lawyers in the same geographic and leg...