Department profile
Crowe & Dunlevy, a Professional Corporation

Intellectual Property

USA Guide 2026 : Oklahoma


Crowe & Dunlevy, a Professional Corporation

Rankings

About

Provided by Crowe & Dunlevy, a Professional Corporation

Crowe & Dunlevy’s IP Practice Group represents clients in all aspects of intellectual property law. Our attorneys are drawn from both the business and litigation areas and experienced in IP procurement, licensing and transactional matters, IP support in complex transactions, IP portfolio management, and litigation before state and federal tribunals. We offer clients IP counsel in a variety of areas including patents, information technology, copyrights, trademarks, unfair trade, the internet, domain names, trade secrets, outsourcing and franchising.

The firm is positioned to guide individuals and businesses with domestic concerns as well as networking with international agents to provide comprehensive service to clients with transnational interests and global IP portfolios. This approach enables our IP group to advise clients in procuring, licensing or enforcing IP in every major region of the world.

Our patent attorneys have the requisite scientific training and industry experience necessary to understand and advise on technology matters while drawing from training in diverse fields such as chemistry, chemical engineering, mechanical engineering, aerospace engineering, petroleum engineering, physics and software and hardware engineering. This collective body of technical experience facilitates technology procurement, protection and exploitation efforts covering a wide array of technologies from polymer chemistry to gaming software, and from industrial equipment to health care.

Industries (15)

  • Banks
  • Charities / Not for Profit
  • Chemicals
  • Education
  • Energy
  • Food & Drink Producers
  • Health Care
  • Insurance
  • Media
  • Mining & Metals
  • Pharmaceuticals & Life Sciences
  • Private Clients / Individuals
  • Software & Computer Services
  • Technology, Hardware & Electronics
  • Telecommunications

Chambers Review

Provided by Chambers

Intellectual Property - Oklahoma

Band 1

Band 1


What the Team is Known For

Crowe & Dunlevy has a full-service practice, catering to the transactional and contentious IP requirements of a regional and national clientele, notably including several leading players in the oil and gas sector. The firm is highly experienced in the licensing of IT assets and, with the support of an international network of partner firms, the management of global patent and trademark portfolios. Also known for its litigation capability, the firm is expanding its ability to handle hi-tech IP issues from the Tulsa office, while also drawing additional support from its Dallas presence. It further acts for a broad range of clients, including academic institutions and manufacturing and energy companies.

Work Highlights

Provided by Chambers

  • The Firm supported EnergySource Minerals in IP matters and strategies for its Project ATLiS, including a USD1.36 billion DOE loan.

Strengths

Provided by Chambers

  • The team at Crowe & Dunlevy is very down to earth with sensible decision making; just the right people doing the work at the right level.

    Intellectual Property respondentUSA
  • The firm's level of service and attention to detail is excellent. The breadth of understanding regarding the nuances to all areas of intellectual property law is impressive

    Intellectual Property respondentUSA
  • The firm is great at communicating advice and helping the client find paths forward.

    Intellectual Property respondentUSA
  • Crowe & Dunlevy is very knowledgeable and helpful in explaining complex matters in a simple way.

    Intellectual Property respondentUSA
  • The firm is responsive, always keeps me up to date and provides the highest level of service.

    Intellectual Property respondentUSA

Notable Practitioners

Provided by Chambers

  • Band 1David Sullivan
    Band 1David Sullivan

    David Sullivan

    David Sullivan offers significant experience in IP matters, including patent issues, licensing and trademark prosecution. He is noted for his particular expertise acting for clients in the energy and oil and gas sectors.
    • David Sullivan always goes above and beyond to serve us.

      Intellectual Property respondentUSA
    • David has great experience, knowledge and is a great support.

      Intellectual Property respondentUSA
    • David handles patent litigation very well and at a high level.

      Intellectual Property respondentUSA
  • Band 1Shawn Dellegar
    Band 1Shawn Dellegar

    Shawn Dellegar

    Shawn Dellegar is frequently sought after by clients in the energy and oil and gas sectors for assistance with patent prosecution. He is also experienced in handling IPR challenges.
    • Shawn Dellegar is great to answer any questions and help decide on the best path forward.

      Intellectual Property respondentUSA
    • Shawn is essential to our business and company.

      Intellectual Property respondentUSA
    • Shawn is superb: very approachable, excellent client manner, and gets the job done right. You know that if he is on the matter, it is taken care of with professionalism and skill.

      Intellectual Property respondentUSA

Ranked Individuals at Crowe & Dunlevy, a Professional Corporation (2)

Oklahoma

Members

Provided by Crowe & Dunlevy, a Professional Corporation

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