Portrait of


  • Tufts University, B.S. (1996) magna cum laude
  • The George Washington University Law School, J.D. (2000)
  • The George Washington University School of Medicine, M.P.H. (2000)


  • District of Columbia
  • Virginia
  • U.S. Patent and Trademark Office (USPTO)


  • Japanese (Beginner)
Deborah H. Yellin, Partner Washington, D.C.
Phone: +1 202.624.2947
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

Deborah H. Yellin is a partner in Crowell & Moring's Washington, D.C. office. She focuses her practice on intellectual property portfolio management, patent procurement, counseling and litigation.

Ms. Yellin's practice has involved assisting both large and small clients with the creation and implementation of intellectual property protection and procurement programs. She works with clients to develop creative solutions to managing intellectual property assets. Ms. Yellin counsels clients regarding domestic and foreign patent filings and provides world-wide patent portfolio oversight.

Ms. Yellin has a diverse range of experience in patent law, including preparing and prosecuting patent applications in the chemical, medical device and pharmaceuticals areas; providing infringement and validity opinions; conducting due diligence and patent landscape analyses; counseling in litigation and post-grant proceedings, including pharmaceutical litigation arising under the Hatch-Waxman Act; and participating in inter partes interferences. Ms. Yellin is experienced in preparing Patent Term Extensions under the Hatch-Waxman Act for both drugs and medical devices, and counseling clients in related issues.

Ms. Yellin has experience with a wide range of chemical and pharmaceutical technologies, including polymers, small molecules and new chemical entities, formulations, research tools, adhesives, catalysts, lignins, lubricants, cosmetics, pesticides and herbicides, chemical processes, adhesives, concrete, coatings, nanomaterials, biologics, recombinant technologies, and drug delivery technologies. Prior to attending law school, she worked in the laboratory. Some of her research projects include studies of the molecular biology of reproduction and the role of dihydrotestosterone in prostate cancer.

Ms. Yellin is a member of several professional organizations, including the American Bar Association and the American Intellectual Property Law Association.

Ms. Yellin received her bachelor's degree in biochemistry from Tufts University. She has a masters of public health from George Washington University. She is admitted to the District of Columbia Bar, the Virginia State Bar and is registered to practice before the United States Patent & Trademark Office.

Representative Cases

  • E.I. du Pont de Nemours and Company v. Kolon Industries, Inc., et al., No. 3:09-cv-58 (E.D. Virginia). Represented plaintiff DuPont in case alleging misappropriation of over 100 trade secrets relating to KEVLAR® fiber technology in one of the largest trade secret misappropriation cases in the United States. Obtained a $919 million verdict against Kolon for the theft of KEVLAR® technology after a seven-week jury trial held in Richmond, Virginia.


Admitted to practice: District of Columbia, Virginia, U.S. Patent and Trademark Office (USPTO)

Professional Memberships

  • Association of University Technology Managers
  • American Intellectual Property Law Association
  • American Chemical Society
  • Virginia Bar Association


Client Alerts & Newsletters

Firm News & Announcements

Jan.04.2016 Crowell & Moring Elects Nine New Partners and Promotes 15 Associates to Counsel
Oct.01.2015 Litigation Note: Crowell & Moring Secures IP Victory for Apotex
Jan.11.2010 Crowell & Moring Elects Four New Partners and Promotes Eight Attorneys to Counsel Positions
Background image