Andrea WeissJeffries


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Andrea Weiss Jeffries has handled formidable intellectual property disputes involving patents, trade secrets, and other forms of IP for more than 20 years. She represents clients in the consumer goods, hardware and software, semiconductor, chemical processing, and pharmaceutical industries in a wide range of cases. She has particularly extensive experience representing clients in high-stakes matters involving patents relating to computer memory, microprocessors, software, database technology, pharmaceutical formulations, medical devices, and wireless communications.

Andrea litigates in California state courts and federal courts across the country. Her many representations prior to joining Jones Day in 2017 include a pharmaceutical company accused of infringing three patents relating to various aspects of an immunoassay analyzer in the District of Delaware, obtaining a favorable settlement just prior to trial; an American multinational conglomerate in a patent ownership dispute relating to technology used in wind turbine generators, and after a six-day bench trial, obtaining a favorable decision regarding the patent at issue; and a global semiconductor chip maker in the Central District of California in a significant competitor dispute involving the infringement of five patents in four technology areas and negotiating a favorable settlement.

Andrea is a member of the Patent Damages & Remedies Working Group Committee (chair emeritus) and the Patent Litigation Best Practices Working Group Committee (vice chair emeritus) of the Sedona Conference. She is a member of the Los Angeles County and Federal Circuit Bar Associations and a member of the Executive Committee of the University of Southern California Intellectual Property Institute's Planning Committee. Andrea has written and spoken extensively on IP-related subjects, particularly on the topic of patent damages.


  • Adocia prevails in biopharma license agreement dispute in international arbitrationJones Day won a binding arbitration award for French biopharmaceutical company, Adocia S.A., in a license agreement dispute against Eli Lilly and Company.
  • Celgene acquires Juno Therapeutics for $9 billionOn behalf of Celgene Corporation, Jones Day conducted a large-scale intellectual property due diligence review and evaluation of matters related to its definitive merger agreement and acquisition of Juno Therapeutics for approximately $9 billion, including Juno’s technology related to CAR-T and TCR cellular immunotherapeutics for use in oncology and other indications.
  • GTAT protects trade secrets, obtains restraining order against former employeeJones Day assisted GT Advanced Technologies (GTAT), a leader in providing technology solutions to the solar industry, in pursuing claims of trade secret misappropriation and breach of contracts against a former employee when he departed the company after over a decade of exposure to its trade secrets and confidential information.
  • The following represents experience acquired prior to joining Jones Day.

    Represented an industrial crystal growth company in a trade secret dispute involving specialized equipment and processes for the purification of materials for the solar industry. Engaged is early mediation and obtained favorable settlement.

    Represented an American toy and board game company against allegations of copyright infringement of board game characters. Obtained favorable settlement.

    Represented a global consumer electronics company accused of infringing a patent involving the processing of compute instructions in the Western District of Wisconsin. Obtained favorable judgment.

    Represented a global sportswear and athletic goods company in a trademark and trade dress matter in the District of Massachusetts. Obtained desirable stay of proceedings.

    Represented a global networking company in patent litigation involving internet traffic transmissions in the Northern District of California. Obtained early dismissal of matter.

    Represented a major semiconductor company in a jury trial in the Central District of California involving the infringement of several patents related to high-speed networking devices used in data centers. Obtained a favorable outcome after a two-year-long patent infringement case. The Federal Circuit affirmed the permanent injunction and the underlying findings of infringement and validity.

    Represented a major networking equipment manufacturer accused of infringing four patents related to point-to-point network communications in the Northern District of California. Obtained early dismissal of matter.

    Represented a global sportswear and athletic goods company in a patent infringement case in the Central District of California involving athlete-sponsored contests for designing shoes using a network-based graphical software tool. Obtained favorable settlement on behalf of client.

    Represented global processor company accused of infringing a family of Wi-Fi patents in the Central District of California. Obtained a favorable claim construction ruling and summary judgment of noninfringement that was upheld on appeal.

    Represented a branded pharmaceutical company in ANDA litigation involving Niacin formulations in the District of Delaware. Obtained favorable settlements.

    Represented a software manufacturer accused of infringing a patent in the Central District of California in obtaining a favorable claim construction ruling and summary judgment ruling.

    Represented Radio Frequency Identification (RFID) tag manufacturer against accusations of infringing 14 patents relating to various aspects of RFID tags in the District of North Dakota in obtaining favorable claim construction and summary judgment rulings or dismissal of 13 of the 14 patents, with the final patent submitted to reexamination proceedings.

    Represented pharmaceutical company accused of infringing two patents relating to cyclosporine formulations in the District of Delaware through trial and on appeal, ultimately prevailing in the Federal Circuit, which affirmed the district court's grant of judgment as a matter of law.

    Speaking Engagements

    • November 7, 2018
      PLI's Trade Secrets 2018: What Every Lawyer Should Know
    • September 15, 2018
      Los Angeles Mayor Women In STEM (WiSTEM) Initiative Launch Moderator of Panel of LA Women CEOs, entitled "Women On The Cutting Edge."
    • April 25, 2018
      Biocom LA: Intellectual Property Pitfalls, Protecting Your Company After First Invention Disclosures & Patent Applications
    • March 20, 2018
      USC Intellectual Property Institute, Panel Moderator, "Considerations of Patent and Technology Readiness in Light of Recent Developments in the Law"
    • February 20, 2018
      Leahy Institute of Advanced Patent Studies, 3rd Annual Naples Roundtable Conference
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