David Clark


Education and Clerkships

J.D., University of Southern California Gould School of Law, 2010, Order of the Coif; Senior Editor, Southern California Law Review

M.S., Electrical Engineering, University of California, Santa Barbara, 2003

B.S., Electrical Engineering, University of California, Santa Barbara, 2002, High Honors; UCSB Regents; Scholar, Tau Beta Pi National Honors Society

  • Law Clerk to the Honorable Andrew J. Guilford, U.S. District Court for the Central District of California



Court Admissions

U.S. District Court for the Central District of California

U.S. District Court for the Southern District of California

U.S. District Court for the Northern District of California

U.S. Court of Appeals for the Ninth Circuit


David Clark is a partner in the Litigation Practice Group in the Orange County office of Haynes and Boone. His experience encompasses a wide range of complex litigation, including patent litigation, licensing matters, and contractual disputes. He has represented clients in various industries, including biotech, semiconductor, apparel, and real estate.

Before law school, David worked as an electrical engineer at Toyon Research Corporation where he performed research and development in areas including RF and microwave circuit design, reconfigurable antenna design, and immune building design.

David maintains an active pro bono practice and has represented clients on matters concerning employment discrimination, immigration, and real estate.

In early 2015, David also served as the Deputy District Attorney as part of the Orange County District Attorney’s TAP Program. David argued motions and conducted jury trials, including solo-chairing two trials through to verdicts.

Selected Client Representations

  • Obtained dismissal in federal court of breach of fiduciary duty claim by minority shareholder against publicly traded corporation, upheld on appeal at 9th Circuit.

Professional Recognition

  • Recognized as a Southern California Rising Star, Thomson Reuters, 2018-2019

Professional and Community Activities

  • Board Member, Federal Bar Association, Orange County Chapter
  • Howard T. Markey Intellectual Property Inn of Court
  • Orange County Bar Association


Courthouse | Haynes and Boone, LLP

Haynes and Boone Secures a String of 9th Circuit Appellate Wins

Haynes and Boone appellate teams secured three wins in cases argued over three consecutive months before the 9th U.S. Circuit Court of Appeals.

Client Focus


Cisco Honors Haynes and Boone for "Excellence in Partnering"

Worldwide technology provider Cisco Systems, Inc. has selected Haynes and Boone for its Excellence in Partnering Award in recognition of the firm’s stellar results on patent litigation and related issues.

Selected Publications and Speeches

  • “The Limits of “Sole Discretion” in Contracts,” co-author, Today's General Counsel, August/September 2017. 
  • “Adding an Alter Ego to a Judgment: How Long Can You Wait?,” co-author, Association of Business Trial Lawyers Report: Orange County, Volume XIX No. 2, Summer 2017.
  • “Cuozzo And The Limits Of Patent Office Discretion,” co-author, Law360, May 1, 2016.

Pro Bono

Daily Journal

Haynes and Boone Honored for Pro Bono Work in Orange County

Orange County’s Public Law Center has named Haynes and Boone, LLP pro bono law firm of the year. The firm is being recognized for its many pro bono efforts in recent years, including its 2015 representation of clients who successfully enjoined the City of Costa Mesa from evicting low-income residents from motels.

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