Douglas L.Clark (Doug)


San Diego + 1.858.703.3133

Doug Clark is involved in many different aspects of civil litigation, with a focus on intellectual property litigation, primarily patents and trade secrets as well as copyrights and trademarks. During his career he has brokered or has been integral to the favorable settlements in at least three dozen matters.

Doug also has successfully argued before the PTAB resulting in the invalidation of an opponent's patent. He has represented clients in diverse categories of technology, including semiconductors, cell phone technology, digital content processing, MMS/SMS technology, wireless communications, memory card readers, thumb drives, electronic locks, RF technology, solar power, wire design, aircraft fire inerting systems, pharmaceutical cancer drugs, gene therapy, bovine vaccines, baby products, truck aerodynamics, exercise equipment, and aircraft seating.

Prior to joining Jones Day, Doug was a submarine officer in the U.S. Navy where he completed the Navy's rigorous nuclear power program and qualified as a nuclear engineer. During his naval career, he addressed NATO allies at a NATO Submarine Conference in Portsmouth, England regarding submarine information sharing and connectivity; acted as a U.S. liaison officer with the Swedish Submarine Force to coordinate the first ever public visit of a Swedish submarine to the Mediterranean; and managed divisions of up to 45 men while on board the USS Columbus out of Pearl Harbor, Hawaii.

Doug is a current director (and events co-chair) of the Tom Homann LGBT Law Association, a member of SDCBA and of the SDIPLA, and a former president of OCIPLA and former director of OCLBA.


  • R.J. Reynolds wins major patent dispute at ITC involving tobacco heating and vaping productsJones Day's client Reynolds prevailed against competitors Philip Morris Products S.A. ("Philip Morris") and Altria Client Services LLC ("Altria") in a patent infringement dispute before the International Trade Commission (ITC) involving tobacco heating and vaping products.
  • Micron Technology asserts trade secret and RICO claims, establishes U.S. jurisdiction over foreign defendants under DTSAJones Day represents Micron Technology, Inc. as a plaintiff in a trade secret and RICO lawsuit against Taiwanese and Chinese entities accused of theft of Micron's semiconductor processing technology.
  • Japanese wire manufacturer and its U.S. subsidiary defend against alleged patent infringement regarding wire technologyJones Day secured a final judgment of non-infringement and invalidity in favor of a Japanese wire manufacturer and its U.S. subsidiary in a patent infringement case related to coil wire technology in the Central District of California.
  • Experian wins partial summary judgmentJones Day won partial summary judgment for Experian Information Solutions, Inc. in an action alleging violations of the Fair Credit Reporting Act, 15 U.S.C. Section 1681 et seq., and the California Consumer Credit Reporting Agencies Act, Cal. Civ. Code Section 1785.1 et seq.
  • Ridge defends against competitor's allegations of infringementJones Day is defending Ridge Corporation against allegations that the company infringes five patents directed to aerodynamic drag reducing devices used in the trucking industry.
  • Wonderland Nurserygoods asserts patent against competitorJones Day represents plaintiff Wonderland Nurserygoods Co., Ltd., one of the world's largest designers and manufacturers of baby products, in a patent infringement case against Baby Trend, Inc., and its officers over Wonderland's patent related to baby play yards.
  • The Nielsen Company obtains preliminary injunctionJones Day obtained a preliminary injunction for The Nielsen Company (US), LLC, NeuroFocus, Inc., and TNC (US) Holdings, Inc. (collectively "The Nielsen Company") against the former chief executive officer of a Nielsen entity.
  • Jones Day achieves a settlement for pro bono client in an unlawful detainer actionIrvine associates Doug Clark, Brianne Jackson, and two summer associates achieved a favorable settlement for their pro bono client in an unlawful detainer action that was set for trial in Orange County Superior Court on July 21, six days after Jones Day was retained.
  • Episil Technologies and Hermes-Epitek obtain dismissal of trade secret litigationJones Day handled this international trade secret misappropriation dispute on behalf of Taiwanese semiconductor foundry Episil Technologies Inc. and equipment supplier Hermes-Epitek Corporation.
  • Celgene obtains dismissal with prejudice of patent infringement claims involving its Vidaza® brand drugJones Day represented Celgene Corporation in a patent infringement lawsuit involving the company’s Vidaza® brand drug that was filed by IVAX LLC in the Southern District of Florida.
  • Micron Technology and Lexar Media successfully resolve ITC patent disputeJones Day successfully represented Micron Technology, Inc. and Lexar Media, Inc. as U.S. respondents in a patent infringement investigation.
  • Wonderland Nurserygoods pursues patent infringement claims against Baby Trend involving baby car seats and strollersJones Day represents plaintiff Wonderland Nurserygoods Co., Ltd. in asserting its patent rights against Baby Trend, Inc.'s baby car seats and strollers.
  • Speaking Engagements

    • January 18, 2017
      IP Year in Review
    • February 26, 2015
      Hot Topics in IP Law and How to Get Hired, Western State University College of Law
    • May 16, 2013
      Design Patents in Light of Apple v. Samsung, Orange County Patent Law Association
    • November 28, 2011
      Intellectual Property Career Paths and the Job Market, panelist, Western State University College of Law