Stephanie M.Mishaga (Steph)


San Diego + 1.858.703.3140

Stephanie Mishaga is an IP lawyer who handles patent prosecution and litigation. She practices before U.S. district courts and the United States Patent and Trademark Office (USPTO). Her experience spans technologies including artificial intelligence (AI), life science AI applications, wireless communication systems including radio frequency identification (RFID) and distributed antenna systems (DAS), bioinformatics, blockchain, semiconductor devices, field-programmable gate arrays (FPGAs), digital signal processing, database management software, graphical user interfaces, software architectures, medical devices and patient monitoring systems, digital health, fitness equipment, on-board diagnostic (OBD) devices, renewable energy technologies including solar panels and electrical vehicles, electronic nicotine delivery systems, and utility power systems.

Steph is a registered to practice before the USPTO. Relying on her industry experience as an electrical engineer, Steph has drafted and prosecuted patent applications and handled trademark opposition proceedings before the Trademark Trial and Appeal Board (TTAB). Utilizing her patent prosecution background, Steph performs freedom to operate, due diligence, and invalidity analyses. She has handled patent litigations and inter partes reviews. Her trade secret litigation experience includes discovering evidence demonstrating source code misuse.

Steph is a member of the Firm's Women in IP initiative. She also has an active pro bono practice assisting United States Armed Forces veterans. Steph also worked on a pro bono project involving animal law.

With more than five years industry experience as an engineer, Steph has experience with combat systems weapon and sensor software development and OBD devices. She integrated radars, guided missile systems, surface guns, and electronic weaponry detection systems aboard U.S. Navy ships.


  • Sempra Energy sells PXiSE Energy SolutionsJones Day advised Sempra Energy in the sale of membership interests in PXiSE Energy Solutions to Yokogawa Electric Corporation.
  • SOLiD fights patent infringement claims over DAS equipment for 5G technologyJones Day is representing SOLiD, Inc. in a multi-jurisdictional patent litigation proceedings brought by a competitor, alleging that client's leading Distributed Antenna System ("DAS") solutions infringe claims of six patents (two European and four U.S.).
  • NEP acquires Prysm Collective, Lux Machina And Halon EntertainmentJones Day advised NEP Group in the acquisition of Prysm Collective, Lux Machina and Halon Entertainment.
  • NXP litigates against competitor in an 18-patent suit directed to RFID technologyJones Day is representing NXP USA Inc. in a patent infringement lawsuit against its competitor Impinj, Inc. in the Western District of Texas.
  • NXP sues Impinj for infringing six patents relating to RFID and wafer-layout technologyJones Day is representing NXP USA, Inc. and NXP B.V. in their enforcement of six radio frequency identification ("RFID") and wafer-layout patents against Impinj, Inc.
  • Qualcomm defeats series of appellate writs by Apple in trade secret litigationJones Day represented Qualcomm Incorporated and Qualcomm Technologies, Inc. at the California Court of Appeal's Fourth District in opposing a series of three petitions for writ of mandate or prohibition brought by Apple Inc.
  • Qualcomm pursues trade secret and contract claims asserting Apple's misuse of Qualcomm's trade secret software and source codeJones Day represented Qualcomm Incorporated and Qualcomm Technologies, Inc. in a lawsuit asserting trade secret misappropriation and breach of contract claims against Apple Inc.
  • Sempra Energy develops patent portfolio directed to advanced electric grid technologiesJones Day is advising Sempra Energy and its subsidiary PXiSE Energy Solutions with the development of a patent portfolio directed to software and hardware solutions directed to improving the efficiency and efficacy of the electrical grid.
  • Cylance develops patent portfolio directed to advanced cybersecurity software utilizing machine learning / artificial intelligenceJones Day is advising Cylance Inc. with the development of a patent portfolio directed to advanced cybersecurity software utilizing machine learning / artificial intelligence.
  • SAP establishes diverse patent portfolio directed to software and database innovationsJones Day represents a leading enterprise software and database developer SAP SE in managing patent portfolios directed to diverse innovations including database technologies, mobility, UX, cloud computing, and big data.
  • Aerospace Corporation establishes cutting edge patent portfolio directed to diverse terrestrial and space innovationsJones Day represents The Aerospace Corporation in strategically developing its patent portfolio directed to diverse innovations including space and terrestrial communication systems and protocols, advanced sensors, optics, and related manufacturing processes.
  • Draeger establishes global patent portfolio directed to diverse medical devices and safety equipmentJones Day represents medical device manufacturer Draeger Medical Systems, Inc. in managing global patent portfolios relating to patient monitors (both hardware and related software), physiological sensors, incubators, and breathing apparatus.
  • ANSYS expands global intellectual property portfolioJones Day provides IP advice to ANSYS, Inc. and assists with the prosecution and management of its international patent portfolio related to engineering simulation for assisting the world's most innovative companies in delivering radically better products to their customers.
  • Speaking Engagements

    • March 2023
      PTAB Strategy Updates in View of Recent Developments
    • August 2019
      Strategies for Protecting AI Innovations
    • July 2019
      Biopharma Meets AI - Potential IP Protection Strategies
    • June 2019
      IP Protection Trends in Artificial Intelligence
    • July 2018
      Artificial Intelligence Deployed in Medical Devices: Patent Strategies and Challenges