Rex A. Donnelly
Shareholder | Wilmington, DE
P: (302) 778-3460
F: (302) 778-2600
Mr. Donnelly is the Managing Shareholder of RatnerPrestia’s Wilmington Office and the former Practice Area Co-Manager of RatnerPrestia’s Trademark Center.  Since joining RatnerPrestia in 1998, Mr. Donnelly has enjoyed a well-rounded practice involving every step of the IP process, including risk management and client counseling; development of IP strategy; procurement of domestic and foreign patents, trademarks, and copyrights; enforcement of IP rights through litigation and alternative dispute resolution, and transactions involving IP. 
Mr. Donnelly's mechanical engineering background and nearly ten years technical experience as a process engineer and environmental coordinator for a Fortune 15 chemical corporation, coupled with his broad base of intellectual property law experiences in a wide variety of technologies, his business acumen, and his balanced perspective, provide a solid base for understanding the technical and legal issues facing clients.  Mr. Donnelly has extensive background prosecuting, providing counseling on and/or litigating patents in the fields of software and business methods, medical and mechanical devices, industrial processes and technology, graphic arts, and alternative energy.
Mr. Donnelly prides himself on taking the time to understand the businesses of his clients and providing timely, thorough, practical, and useful advice that realizes his clients’ strategic objectives.
Mr. Donnelly has hosted INTA roundtables and presented on the topics of general and specific interest in the field of intellectual property, including patents, trademarks, advertising law, and copyrights, for groups including the AIPLA, the Pennsylvania Bar Institute (PBI), the Philly Ad Club, university faculty, and others.
Practice Expertise Bio(s)

Articles & Presentations

Bar Admissions
  • Delaware (1996)
  • U.S. District Court for the District of Delaware (1999)
  • United States Patent and Trademark Office (1997)

  • J.D., Cum Laude, Widener University School of Law (1995)
  • B.S., Mechanical Engineering, Virginia Tech (1988)
    • Virginia Tech 1988 Man of the Year

  • Delaware Bar Association
  • International Trademark Association (INTA)
    • Committee Member (2006-present)
  • Federal Bar Association
Continuing Education
  • National Institute of Trial Advocacy
    • Deposition Skills, Philadelphia, PA (2001)

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