Nathaniel Longley

Nathaniel Longley




Nat leverages these skills to build outstanding, global IP portfolios in the medical, computer, and energy industries, including catheter devices, implants, patient transport devices, radiation imaging, pharma, cloud-based transactional services, oil and gas technology, jet engines, rocket motors, and solar and nuclear energy.

Nat also has broad transactional and litigation-related experience, working together with the Dorsey IP team to provide full-service representation to both first-year startups and established fortune 500 companies. Nat shares a strong commitment to needs-based pro bono legal services, is a member of the fourth district ethics committee, and was named one of Minnesota’s “Rising Stars” in the 2013 through 2017 editions of Super Lawyers.

Education & Admissions

University of Minnesota Law School (J.D., 2006), cum laude; Dean’s List; Royal A. Stone Scholar

California Institute of Technology (Postdoctoral Fellow, 1995), “Physicist-in-Charge,” MACRO Experiment

University of Minnesota (Ph.D., Physics, 1993), Research Fellow, U.S. Department of Energy

Carleton College (B.A., 1986), cum laude; Dean’s List; National Merit Scholar


  • Minnesota
  • United States Patent and Trademark Office
  • U.S. Court of Appeals for the Eighth Circuit
  • U.S. Court of Appeals for the Federal Circuit


  • Written Latin; newspaper-level French and Italian; FORTRAN, C/C++; Unix, Java, and Python Scripts


Representative Experience

Dr. Longley (“Nat”) has extensive experience with global IP management in the medical and energy sectors, including patent drafting and prosecution work in medical devices, radiation imaging, patient transport, power systems engineering, turbine engine systems, nuclear and solar power, energy exploration, and nuclear physics, including advanced nuclear fuel cycles.  Nat was also a postdoctoral fellow at the California Institute of Technology, where he was “physicist in charge” of the MACRO facility operated in partnership with the Italian National Institute of Nuclear Physics.  He has published and lectured extensively in the field, including collaborative work at Fermilab, CERN and Oxford, and the Institute of High Energy Physics of the Chinese Academy of Sciences in Beijing.

Representative Litigation

Prosecution, Litigation & IP Enforcement
  • Represent clients before the United States Patent office, Patent Trial and Appeal Board, and Unites States Court of Appeals for the Federal Circuit.
  • Patent prosecution and IP enforcement for medical device startup, with successful licensing arrangement for products covered under newly-issued US patents.
  • Defended against ex parte review of issued patent for medical device client, resulting in confirmation of all originally allowed claims (medical imaging technology).
  • Patent prosecution and portfolio management for rapidly growing, high-end beauty products client, increased in less than one year from a single US patent to more than two dozen issued patents, design registrations, and new applications.
  • IP analysis for private equity client, resulting in seven-figure investments in successful high-tech startups (defense-related and renewable energy industries).
  • Provided legal review of draft guidelines for electrical engineering client, with goal to reduce potential liability related to industry standards.
  • Patent prosecution and portfolio management for established electrical engineering client, generating more than fifty patent grants over most recent two-year period (cloud-based and secure data storage technologies).
  • Successful defense against well-known “trolls” asserting patents against food services and insurance industry clients, without litigation, financial settlement, or required licensing agreement.
  • Provided key litigation support and research services in successful defense of aerospace client, with nearly $4bn patent infringement claim dismissed on summary judgment.

News & Resources


Federal Circuit Holds District Court Abstractness Analysis Too Abstract for Alice under 35 USC § 101
Which Way From Here? Subject Matter Eligibility After Alice v. CLS Bank (Intellectual Property Today)
The European Unitary Patent – Implications and Strategies for U.S. Businesses (Intellectual Property Today)
Overview of Intellectual Property for Business Lawyers (Kinney & Lange, PA)
Intellectual Property Law for Business Lawyers, Ch. 12, Trade Secret Law (Thomson West)
The IP Book, 5th Ed., Chapter 2, KSR Int’l Co. v. Teleflex Inc. (Midwest Intellectual Property Institute)

News & Press Mentions

Super Lawyers Recognizes 36 Dorsey Lawyers in Minneapolis
Super Lawyers Recognizes 37 Dorsey Lawyers in Minneapolis
Dorsey & Whitney Names New Partners
Super Lawyers Recognizes 39 Dorsey Lawyers in Minneapolis
Super Lawyers Recognizes 39 Dorsey Lawyers in Minneapolis
Super Lawyers Recognizes 39 Dorsey Lawyers in Minneapolis

Industries & Practices

Non-Profit & Tax Exempt Organizations
Patent Prosecution, Portfolio Strategy & Management
  • Banking & Financial Institutions
  • Electric Power
  • Energy & Natural Resources
  • Healthcare
  • Intellectual Property Litigation
  • Mining
  • Non-Profit & Tax Exempt Organizations
  • Oil & Gas
  • Patent Prosecution, Portfolio Strategy & Management
  • Sustainability
  • Technology

Professional & Civic

Community Involvement

  • Innocent Project of Minnesota
  • Legal Corps USPTO Inventor Assistance Program
  • 4th District Ethics Committee Investigator


North Star Lawyer logo

  • Listed as a "Rising Star" by Minnesota Super Lawyers, 2013-2017
  • MSBA North Star Lawyer, 2013-2018
  • National Science Foundation Fellow
Nathaniel Longley