ABOUT D. Joseph English

D. Joseph English

practices in the areas of intellectual property law and litigation, including patents, trademarks and copyrights with particular emphasis in the acquisition and litigation of intellectual property rights in a variety of technical arts.

Mr. English represents U.S. and foreign clients in the acquisition of patent rights in diverse technologies such as aircraft engines, fuel cells, discharge and LED lighting, thin film coatings, highly pure chemical compositions, telecommunications, semiconductors, wireless communications and computer software, and assists clients in establishing competitive patent review and enforcement programs.

Mr. English has served as litigation counsel both in the enforcement of, and defense against patent infringement lawsuits in federal courts throughout the United States. He has assisted litigation clients in developing appropriate strategies to challenge asserted patents before the PTAB and has prepared and filed petitions seeking Inter Partes Review (IPR) for a variety of clients. Mr. English has also successfully represented patent owners in defending challenges before the PTAB.

Mr. English counsels clients in the development, maintenance and protection of brand identifiers, including conducting registrability investigations, prosecuting trademark applications, initiating and defending inter partes proceedings before the United States Patent and Trademark Office, reviewing marketing materials and coordinating international protection programs. Mr. English has represented clients in litigation regarding trademark infringement and unfair competition.

Mr. English is registered to practice before the United States Patent and Trademark Office and admitted to practice in Virginia and various federal courts, including the Court of Appeals for the Fourth Circuit and the United States Supreme Court.

Prior to entering private practice, Mr. English served as a nuclear submarine officer in the U.S. Navy. Mr. English is a graduate of the Columbus School of Law of The Catholic University of America and a graduate of the United States Naval Academy (B.S., mechanical engineering).


•Duane Morris LLP
- Partner, 2002-present
•Carter, Ledyard & Milburn, Washington, D.C.
- Counsel, 2000-2001
•Rogers & Killeen, Alexandria, Virginia
- Partner, 1998-2000
- Associate/Patent Agent, 1995-1998
•United States Navy
- Nuclear Submarine Officer, 1986-1994

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Areas of LAW

  • Copyrights
  • Intellectual Property
  • Patents
  • Unfair Competition

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